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Wyświetlanie 1-7 z 7
Tytuł:
Rola cyrkulacji atmosfery w kształtowaniu temperatury powietrza w styczniu na Spitsbergenie
Role of atmospheric circulation on the January temperature variability in Spitsbergen
Autorzy:
Niedźwiedź, T.
Powiązania:
https://bibliotekanauki.pl/articles/260696.pdf
Data publikacji:
2004
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
cyrkulacja atmosfery
Spitsbergen
temperatury powietrza
atmospheric circulation
air temperature
Opis:
The study presents variability of simple circulation indices above Spitsbergen for the period 1899-2004 in January, based on original calendar of synoptic divided from the synoptic maps. After calculation of synoptic types frequencies the further results have been obtained using the simple circulation indices: W - westerly, zonal index, S - southerly - meridional index, C - cyclonicity index, as proposed by R. Murray and R. Lewis (1966) with some modifications, as well as Spitsbergen Oscillation (OS) defined as the standarized pressure difference between Bjornoya and Longyearbyen. The negative value of W index is typical for Spitsbergen, according to great frequency of eastern airflow. Variability of January temperature in Svalbard (t01SV) were investigated on the basis of averages from four stations: Isfjord Radio and Svalbard Lufthavn, as well as from Polish Polar Station in Hornsund Fiord on SW part of Spitsbergen, and from Bjornoya (Bear Island) - about 300 km SSE from Hornsund. After reconstructions of some lack data on the basis of linear regression, temperature data were obtained for the period of 1912-2004. For the temperature the main feature is period of cooling in the years 1912-1918 and then the great warming during the decade of 1930th (1933-1937). During the years 1937-1971 was observed the significant decreasing trend in January temperature to the cool period of years 1962-1971. The last period 1971-2004 has no any trend in temperature. But three large fluctuations took place with warm Januarys of 1972-1974, 1990-1992 and 1999-2001 and cool ones of 1975-1982, 1993-1998 and 2002-2004. Temperature of January changes in Spitsbergen depend on a great extend of circulation factors, mainly from the southern (S) and zonal circulation indices (W) or Spitsbergen Oscillation index (SO). Using the models of multiple regression was possible the recontruction of January temperature since 1899 on the basis of circulation indices. They explained about 63% of variance in temperature.
Źródło:
Problemy Klimatologii Polarnej; 2004, 14; 59-68
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stosunki termiczne i wilgotnościowe w Zatoce Treurenberg i na masywie Olimp (NE Spitsbergen) w okresie od 1.VIII.1899 - 15.VIII.1900
Thermal and humidity relations in Treurenberg Bay and Massif Olimp (NE Spitsbergen) from 1st August 1899 to 15th August 1900)
Autorzy:
Przybylak, R.
Dzierżawski, J.
Powiązania:
https://bibliotekanauki.pl/articles/260665.pdf
Data publikacji:
2004
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
temperatury powietrza
wilgotność powietrza
Spitsbergen
air temperature
atmospheric humidity
Opis:
The paper describes weather conditions (based on air temperature and humidity) in Treurenberg Bay and Massif Olimp (NE Spitsbergen) for the period from 1st August 1899 to 15th August 1900. The hourly data of the meteorological elements under analysis were collected by the Swedish-Russian scientific expedition, which was sent to Spitsbergen in 1899 to measure an arc of the Earth?s meridian. During the expedition two meteorological stations were established (Fig. 1): the main one (21.9 m a.s.l.) located by the sea in Treurenberg Bay (hereafter 'Treurenberg') and a secondary station (408 m a.s.l.) situated on Massif Olimp (hereafter 'Olimp'). The quality of data were checked and assessed as being very good, especially for the Treurenberg station. The air temperature (T) in Treurenberg in the annual march was highest in August (mean monthly T = 2.1°C) and lowest in March (-27.0°C) (Tab. 2, Fig. 2). Mean yearly T was equal to -9.8°C. The values of T in this part of Spitsbergen are significantly lower than in the western coastal part of the island where, for example, the average annual T for the period 1975-2000 was about twice as high (see Przybylak et al. 2004). On the other hand, mean monthly daily T ranges in Treurenberg are greater (Fig. 3). Day-to-day T changes in the annual cycle were greatest in the cold half-year, and lowest in summer (Fig. 4). These changes are lower here than in the western coastal part of Spitsbergen. Mean monthly daily courses of T are clearest from April to September, showing maximum T in the afternoon, and minimum in the early morning hours (Fig. 5). From October to March (but especially during the polar night) the average daily courses were smooth. Air humidity in Treurenberg was characterized using three commonly used variables: water vapor pressure, relative humidity, and saturation deficit. Due to very low T and quite a large thermic continentality of the climate in NE Spitsbergen, water vapor pressure in Treurenberg is lower than in the western coastal part of Spitsbergen. The highest values in Treurenberg occurred in summer (on average about 6 hPa) and the lowest in late winter (below 1 hPa) (Tab. 2, Fig. 6). Generally, similar relations in the annual march are also seen for two other air humidity variables (see Tab. 2, Fig. 6). The annual cycles of day-to-day changes of all humidity variables in Treurenberg are not clear, as they consist of many maximums and minimums (Fig. 7). These changes are lower here than in other parts of Spitsbergen (see Table 15 in Przybylak 1992a). Mean daily courses of relative humidity are smooth for most months. Only in April and in the period from June to September do we see normal daily cycles with lowest values in 'day' hours and highest values in 'night' hours (Fig. 9). The annual course of T in the Olimp station is similar to that occurring in Treurenberg (Figs. 2 and 10). Of course, the upper station was colder, but only by 1oC for mean annual values (Fig. 11). The drop of T in the Treurenberg region - a drop that is lower than is normally observed in the atmosphere (0.6oC/100 m) - was probably caused by measurement errors (the thermograph at the Olimp station was wrapped in thin material in order to stop the snow accumulating around the metallic sensor). Only limited air humidity data were gathered for the Olimp station due to measurement problems of this element in cold half-year. Therefore, most observations were made only in summer, and they show that the relative humidity was in most cases greater here than at the Treurenberg station. The investigation shows that weather conditions in the NE part of Spitsbergen differ significantly from those observed in the western coastal part of the island. Both T and air humidity are significantly lower in the study area, and these differences in the case of T are especially large in winter.
Źródło:
Problemy Klimatologii Polarnej; 2004, 14; 133-147
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ cyrkulacji atmosferycznej na warunki termiczne sezonów letnich (VII-VIII) w Calypsobyean (zachodni Spitsbergen)
The influence of atmospheric circulation on thermic conditions in summer seasons (VII-VIII) in Calypsobyen (Western Spitsbergen)
Autorzy:
Gluza, A.
Siwek, K.
Powiązania:
https://bibliotekanauki.pl/articles/260757.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
cyrkulacja atmosferyczna
temperatura powietrza
Calypsobyen
Bellsund
Spitsbergen
atmospheric circulation
air temperature
Opis:
Zarys treści. W pracy przedstawiono wpływ cyrkulacji atmosferycznej według klasyfikacji T. Niedźwiedzia na warunki termiczne w miesiącach letnich (lipiec i sierpień) w rejonie Bellsundu. Wykorzystano wartości dobowe (średnie, maksymalne i minimalne) temperatury powietrza z wysokości 200 cm n.p.g. ze stacji meteorologicznej w Calypsobyen. Dane pomiarowe pochodzą z sezonów letnich pięciu Wypraw UMCS na Spitsbergen z lat 2006-2009 i 2011. Długość serii pomiarowych w poszczególnych latach była związana z terminami rozpoczęcia i zakoń-czenia wypraw. Ponieważ pomiary wykonywane były w różnych terminach (między pierwszą dekadą czerwca a pierwszą dekadą września) do analizy wykorzystano dane z okresu wspólnego tj. od 1 lipca do 31 sierpnia. Łącznie przeanalizowano dane z 310 dni (po 62 dni z każdego roku).
The paper analyses relationship between atmospheric circulation and air temperature in Calypsobyen Bellsund region (NW Spitsbergen) in period 01st July – 31st August from the years 2006-2009 and 2011. For this purpose data from meteorological station in Calypsobyen (. = 77°33’29,5”N, . = 14°30’46,6”E), daily values of four temperature parameters (mean, maximum, minimum, diurnal temperature range) and daily types of atmospheric circulation for Spitsbergen made by T. Niedźwiedź have been used. The station is located on Calypsostranda, a flat sea terrace, at the height of about 23 m a. s. l., at a distance of 200 m from Bellsund Fjord and 2 km from the Scott Glacier. Dry lichen-moss tundra forms the substrate of the station. Circulation types Ca+Ka (about 20%) and Cc+Bc (about 14%) occurred the most frequently in analysed period. Types Sa+SWa+Wa and Ea+SEa (about 8%) occurred the most rarely. The highest mean daily temperatures were notified in circulation types Ea+SEa and Sa+SWa+Wa. Highest maximum temperatures were notified in circulation types NWc+Nc+NEc and NWa+Na+NEa. Lowest minimum temperatures were notified in circulation types Ca+Ka and Cc+Bc. Highest values of diurnal temperature range were notified in circulation types Sa+SWa+Wa, NWa+Na+NEa and Ea+SEa. In summer seasons air temperature in Calypsobyen depend mainly on direction from which air masses are coming. Local circulation is also important as well as foehn wind effect, radiation and insolation processes. Type of baric situation is mostly not so relevant.
Źródło:
Problemy Klimatologii Polarnej; 2012, 22; 27-34
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Współczesna zmienność cyrkulacji atmosfery, temperatury powietrza i opadów atmosferycznych na Spitsbergenie
Contemporary variability of atmospheric circulation, temperature and precipitation in Spitsbergen
Autorzy:
Niedźwiedź, T.
Powiązania:
https://bibliotekanauki.pl/articles/260947.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
cyrkulacja atmosfery
temperatury powietrza
opady atmosferyczne
Spitsbergen
atmospheric circulation
air temperature
precipitation
Opis:
The study presents variability of simple circulation indices above Spitsbergen for the period 1951-2002, based on original calendar of synoptic divided from the synoptic maps. After calculation of synoptic types frequencies the further results have been obtained using the simple circulation indices: W - westerly, zonal index, S - southerly - meridional index, C - cyclonicity index, as proposed by R. Murray and R. Lewis (1966) with some modifications. The negative value of W index is typical for Spitsbergen, according to great frequency of eastern airflow. Some complicated relations between above indices, NAO, temperature and precipitation were noticed in Spitsbergen. Variability of temperature and precipitation based on the data from Isfjord Radio and Svalbard Lufthavn stations, as well as from Polish Polar Station in Hornsund Fiord on SW part of Spitsbergen. They were compared with Bjornoya (Bear Island) - about 300 km SSE from Hornsund. For the temperature the main feature is period of cooling in the years 1961-1971 and around 1988, after the great warming during the decade of 1930th. During that coolest years also large annual temperature range was typical. The coldest was year 1968, and the warmest one -1984 (from -2 to -3°C). Next warm years were observed in 1990 and 1999, but in Jan Mayen the warmest was year 2002. The coolest winter (December-February) with average temperature below -20°C in Longyearbyen was in 1962/1963 (-21.5°C) and 1988/1989 (-20.1°C), and the warmest one on 1984/1985 (-8.3°C). Significant warming was noticed only in the warm half-year (V-X) about 1.2K since 1972 up to 2002. The warmest period V-X was in 1990, and coolest - in 1968. In summer (June-August) the temperature varied between 2°C in 1982 and 4.5°C (Hornsund) or 6.1°C (Longyearbyen) in 2002 (the warmest summer). Temperature changes in Spitsbergen depend on a great extend of circulation factors, mainly from the southern (S) and zonal circulation indices (W). The lowest temperatures were observed round the 1965. During the last decade of 1980 the period of little warming is observed again. For precipitation relative large increase of summer and September precipitation were noticed in the last years of the 20th century, mainly in 1994-1997. May be the part of its fallen in the form of snow in the upper parts of archipelago and supplied glaciers. The highest precipitation is typical for August and September. The largest diurnal precipitation totals - 58.3 mm was observed on August 1, 1994. The second high value 52.6 mm was noticed on September 6, 1996. During the observed period since 1978, only 5 time the daily precipitation in Hornsund exceeded 40 mm and 14 time were higher than 30 mm. In Hornsund annual total of precipitation twice exceeded 600 mm, in 1994 and 1996. This increase of precipitation was connected with greater frequency in the intensity of westerly and southerly atmospheric circulation expressed by the zonal and meridional circulation indices and the more intense cyclonic activity in autumn and winter seasons
Źródło:
Problemy Klimatologii Polarnej; 2003, 13; 79-92
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie przestrzenne wilgotności względnej powietrza w północnej części równiny Kaffiøyra i na Lodowcu Waldemara (NW Spitsbergen) w okresie od września 2010 do sierpnia 2013
Spatial diversity of air relative humidity in the northern part of the Kaffiøyra plain and the Waldemar Glacier (NW Spitsbergen) from September 2010 to August 2013
Autorzy:
Przybylak, R.
Araźny, A.
Ulandowska-Monarcha, P.
Powiązania:
https://bibliotekanauki.pl/articles/260842.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Arktyka
Spitsbergen
klimat
wilgotność względna powietrza
cyrkulacja atmosferyczna
Arctic
climate
relative air humidity
atmospheric circulation
Opis:
W artykule przedstawiono zróżnicowanie przestrzenne wilgotności względnej powietrza w północnej części rejonu Kaffiøyry i na Lodowcu Waldemara w okresie IX 2010 – VIII 2013. W okresie od września 2010 do sierpnia 2011, dla którego istnieją najpełniejsze dane dla wszystkich stanowisk pomiarowych, najwyższe wartości wilgotności względnej zostały zanotowane na szczytach górskich (89%) i na polu firnowym Lodowca Waldemara (86%). Najniższa wartość tego parametru wystąpiła natomiast na tundrze (79%). W całym okresie badawczym, na podstawie zredukowanej liczby stacji, stwierdzono, iż najsuchszy był punkt Kaffiøyra-Heggodden (KH, 83%) zlokalizowany na morenie czołowo-bocznej Lodowca Aavatsmarka, a najbardziej wilgotno było na polu firnowym Lodowca Waldemara (LW2, 85%). Wilgotność względna na badanym obszarze wykazała przeważnie wzrost wartości wraz ze wzrostem wysokości nad poziom morza. Najwilgotniejsze powietrze w rejonie badań towarzyszyło typom cyrkulacji Sc+SWc+Wc i Sa+SWa+Wa (anomalie dodatnie od 7 do 9%), a najsuchsze (anomalie ujemne wahające się od 6% do 9%) podczas napływu mas powietrza z sektora wschodniego, niezależnie od rodzaju układu barycznego. Najmniejsze różnice (do ok. 1-2%) wystąpiły w sytuacjach bezadwekcyjnych reprezentowanych przez typ Ka+Ca.
This paper presents the spatial diversity of air relative humidity (2 m a.g.l.) in the northern part of the Kaffiøyra Plain and on the Waldemar Glacier (NW Spitsbergen), from September 2010 to August 2013, based on measurements taken at six sites located in different environments (Table 1, Figure 1). Results are described for years and seasons, defined as: autumn (Sep-Oct), winter (Nov-Mar), spring (Apr-May) and summer (Jun-Aug). In the period from September 2010 to August 2011, the highest relative humidity was noted on mountain ridges (89%) and in upper part of the Waldemar Glacier (86%). The lowest value of humidity (79%) occurred at a tundra site called ‘Terrace’, located about two kilometres from the coast (Table 2, Figure 2). In the entire period of observations, for which a reduced number (3) of observation sites exists, drier air (83%) was observed at the Kaffiøyra-Heggodden (KH) site, located in the terminal-lateral moraine of the Aavatsmark Glacier, whereas the wettest air (85%) was measured at the firn part of the Waldemar Glacier (LW2). Relative humidity generally shows an increase as altitude increases above sea level. The marked influence of atmospheric circulation on relative humidity was also noted. In the study period, as compared to long-term values from 1951 to 2006, a decrease in the frequency of occurrence of anticyclonic types and an increase in the frequency of cyclonic types (by 10% and 6.8%, respectively) was also noted (Figure 3). Most humid air in the study area occurred within the circulation types Sc+SWc+Wc and Sa+SWa+Wa (positive anomalies varied from 7% to 9%), and the driest (negative anomalies from 6% to 9%) during air advection from the eastern sector within both anticyclonic and cyclonic weather patterns (Table 3 and Figure 4). The smallest differences (up to 2%) were connected with non-advectional weather type Ka+Ca.
Źródło:
Problemy Klimatologii Polarnej; 2014, 24; 25-36
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Związek akumulacji śniegu na lodowcach północno-zachodniego Spitsbergenu z cyrkulacją atmosferyczną, opadami i temperaturą powietrza w okresach zimowych
Relation between the snow accumulation on glaciers of North-West Spitsbergen and the atmospheric circulation, precipitation and air temperature in the winter seasons
Autorzy:
Grabiec, M.
Powiązania:
https://bibliotekanauki.pl/articles/260836.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Spitsbergen
akumulacja śniegu
cyrkulacja atmosferyczna
opady
temperatury powietrza
snow accumulation
atmospheric circulation
precipitation
air temperature
Opis:
This work attempts to determine connections between glaciers' winter mass balance and meteorological factors of winter seasons. Detailed analysis was carried out between the snow accumulation of Austre Broggerbreen and the meteorological data from Ny-Alesund station (Kongsfjord region) from 1975 to 1998. Relation has been found between the snow accumulation and warm and humid air masses frequency in winter seasons (X - V). Those masses are mainly from southerly and southwesterly directions for Svalbard. The winter mass balance shows very clear connection with air temperature and precipitation factors of winter seasons (sum of winter precipitation, number of days with precipitation intensity >= 5 mm per day, winter mean air temperature, and number of days with maximum daily air temperature >= 0°C). A particularly close connection is observed between winter mass balance and number of days with precipitation intensity >= 5 mm per day at the positive daily maximum air temperature (LPTmax) (r = 0.81) - Fig. 8. The winter mass balance multiply regression (Wb) was worked with the use of the elementary meteorological factors: the average winter temperature (T) and the sum of precipitation in the same period (P). On the basis of the multiply regression of winter balance it is possible to predict snow accumulation changes. Over the next 50 years the winter snow accumulation of Austre Broggerbreen could increase about 15% if the scenario of climatic changes by Hanssen-Bauer (2002b) is used. If, in addition, one assumes the stability of ablation, the mass balance of glaciers will rise by 24%, but the mass balance will still be negative.
Źródło:
Problemy Klimatologii Polarnej; 2003, 13; 161-171
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność maksymalnej miąższości czynnej warstwy zmarzliny w rejonie Bellsundu (W Spitsbergen) w okresie 1986-2009
Changeability of maximal thickness of active permafrost layer in the Bellsund region (W Spitsbergen) in the period 1986-2009
Autorzy:
Marsz, A. A
Pękala, K.
Repelewska-Pękalowa, J.
Styszyńska, A.
Powiązania:
https://bibliotekanauki.pl/articles/261035.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
wieloletnia zmarzlina
warstwa czynna
temperatura powietrza
cyrkulacja atmosferyczna
temperatura powierzchni morza
Spitsbergen
permafrost
active layer
air temperature
atmospheric circulation
sea surface temperature
Opis:
W pracy przebadano wpływ temperatury powietrza, cyrkulacji atmosferycznej i temperatury powierzchni morza na Prądzie Zachodniospitsbergeńskim na zmiany maksymalnej miąższości czynnej warstwy zmarzliny na Calypsostrandzie (Bellsund) w latach 1986-2009. Stwierdzono, że podstawowym czynnikiem klimatycznym, regulującym tą zmienność jest temperatura powietrza w Svalbard-Lufthavn, co pozwala na rekonstrukcję przebiegu zmian miąższości czynnej warstwy zmarzliny na Calypsostrandzie w okresie 1911-2009. W badanym okresie nie zachodzą istotne związki między miąższości czynnej warstwy zmarzliny a zmiennością wskaźników cyrkulacji hemisferycznej (AO) i regionalnej (NAO). Bardzo silny wpływ na miąższość czynnej warstwy zmarzliny na Calypsostrandzie wywierają zmiany temperatury powierzchni Morza Grenlandzkiego w rejonie przepływu ciepłego Prądu Zachodniosptsbergeńskiego.
The measurements of thickness of the sling part of permafrost thawing in summer i.e. permafrost active layer were made on Spitsbergen in the Bellsund region in 1986-2009 within the polar expedition programs accomplished by Maria Curie Skłodowska University, Lublin. The investigations included the seaside plain Calypsostranda situated on the western side of Recherche Fiord in the forefield of the glaciers Scott and Renard (Fig. 1) constituting a complex of raised marine terraces formed during the glacioisostatic movements. Maximal thickness of active permafrost (CWCmax) was determined using the sounding method in 10 chosen points localized within the geocomplexes typical of tundra (Fig. 2). The average many years' maximal values of active layer thickness are presented in Table 1. The paper presents the results of studies on the effect of air temperature, atmospheric circulation and sea surface temperature on Western Spitsbergen Current on the variation of maximal thickness of active permafrost layer. As follows from the studies the interyear changes of maximal thickness of the active layer on Calypsostranda are relatively susceptible to the changes of air temperature which indicates prompt susceptibility to changes. The tendency towards the increase of ground thawing depth on Calypsostranda in 23 years under consideration is not stable and can change significantly depending on temperature. Though there is no doubt that during the last 4-5 years there have appeared signs of quickened increase of active layer thickness on Calypsostranda (Fig. 4), the conclusion about permanent degradation of permafrost seems to be risky at present. Of the climatic factors the essential one affecting the interannual changeability of maximal thickness of the active layer on Calypsostranda is air temperature in Svalbard-Lufthaven. The regression analysis showed (Equation 1) that the variance CWmax is explained best by the merged May and June temperatures (SVsumT_V-VI) and the average March temperature (SVT_III) (Fig. 5). Changeability of these both variables accounts for 83% variance CWCmax. Equation [1] allows to reconstruct the course of changes of maximal thickness of the active layer on Calypsostranda in 1911-2009 (Fig. 6). In the studied period distinct and essential connections between CWCmax on Calypsostranda and changeability of hemispheric circulation indices (AO) or regional (NAO) were not found. However, temperature changes of Greenlandic Sea surface in the region of warm Western Spitsbergen Current flow (Table 3) affect significantly on air temperature on Spitsbergen and as a result on active layer thickness on Calypsostranda. As the hitherto course of maritime processes indicates a gradual decrease in heat resources carried by Western Spitsbergen Current, one can deduce that air temperature in the region of Spitsbergen will drop in near future. That will probably lead to a decrease in thawing depth on Calypsostranda. Differentiation in active layer thickness is dependent on local factors such as configuration, aspect of slopes, vegetation cover as well as kind and extent of water mobility in covers as it was reported earlier.
Źródło:
Problemy Klimatologii Polarnej; 2011, 21; 133-154
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
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