Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland
Environmental parameters of polygonal patterned ground were monitored near the Kytalyk Station (Indigirka-Lowland, 2011-2012) as well as near the fishing village Pokhodsk (Kolyma Delta, 2012-2013) in north-east Siberia. Both sites, located in a thermokarst depression (alas) and on a flood plain of a...
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University of Lisbon and the University of Évora
2014
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ftawi:oai:epic.awi.de:35769 2024-09-15T18:30:12+00:00 Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland Schirrmeister, Lutz Schneider, Andrea Wetterich, Sebastian Pestryakova, L. A. 2014-06-18 application/pdf https://epic.awi.de/id/eprint/35769/ https://epic.awi.de/id/eprint/35769/3/Poster_EUCOP-IV_schirrmeister%282%29.pdf http://www.eucop4.org/ https://hdl.handle.net/10013/epic.43694 https://hdl.handle.net/10013/epic.43694.d003 unknown University of Lisbon and the University of Évora https://epic.awi.de/id/eprint/35769/3/Poster_EUCOP-IV_schirrmeister%282%29.pdf https://hdl.handle.net/10013/epic.43694.d003 Schirrmeister, L. orcid:0000-0001-9455-0596 , Schneider, A. , Wetterich, S. orcid:0000-0001-9234-1192 and Pestryakova, L. A. (2014) Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland , 4th European Conference on Permafrost, Evora, 18 June 2014 - 21 June 2014 . hdl:10013/epic.43694 EPIC34th European Conference on Permafrost, Evora, 2014-06-18-2014-06-21Evora, University of Lisbon and the University of Évora Conference notRev 2014 ftawi 2024-06-24T04:09:53Z Environmental parameters of polygonal patterned ground were monitored near the Kytalyk Station (Indigirka-Lowland, 2011-2012) as well as near the fishing village Pokhodsk (Kolyma Delta, 2012-2013) in north-east Siberia. Both sites, located in a thermokarst depression (alas) and on a flood plain of a small river branch, respectively, are typical low-center polygons of about 20 m in diameter, enclosed by polygon walls and frost cracks. Sensors recorded ground temperature up to one meter depth and soil moisture conditions in the active layer down to the permafrost table. The air temperature was measured at 2 m height on the polygon rim. In polygon ponds, electrical conductivity, water level and water temperature were logged during field seasons from mid-July to the end of August. All data loggers measured every 30 minutes to record diurnal cycles. At both sites ground and air temperature records were collected for a complete year. Furthermore, soil moisture was recorded for a year at the Pokhodsk site, where the monitoring continues until 2015. The recorded air and water temperatures co-vary and show similar daily pattern during the monitored summer period, with a general cooling trend towards the end of the season. Both air and water temperatures seem to be related to water level changes and variations in electrical conductivity. Furthermore, a ground temperature differentiation in the active layer is present. Main peaks and dips follow air temperature patterns, even in the lowermost and coldest horizon of the active layer. Compared to the record from the enclosing polygon rim the temperature differentiation in the polygonal depression is more distinct in the lower horizon and shows a wider temperature range. Soil moisture sensors show mostly constant over time moisture contents in the active layer. Surface soil horizons were driest, interrupted by some short term events, which point to abruptly increasing surface moisture (rainfall) that were also registered as a weaker increase in moisture in the deeper ... Conference Object permafrost Thermokarst Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Environmental parameters of polygonal patterned ground were monitored near the Kytalyk Station (Indigirka-Lowland, 2011-2012) as well as near the fishing village Pokhodsk (Kolyma Delta, 2012-2013) in north-east Siberia. Both sites, located in a thermokarst depression (alas) and on a flood plain of a small river branch, respectively, are typical low-center polygons of about 20 m in diameter, enclosed by polygon walls and frost cracks. Sensors recorded ground temperature up to one meter depth and soil moisture conditions in the active layer down to the permafrost table. The air temperature was measured at 2 m height on the polygon rim. In polygon ponds, electrical conductivity, water level and water temperature were logged during field seasons from mid-July to the end of August. All data loggers measured every 30 minutes to record diurnal cycles. At both sites ground and air temperature records were collected for a complete year. Furthermore, soil moisture was recorded for a year at the Pokhodsk site, where the monitoring continues until 2015. The recorded air and water temperatures co-vary and show similar daily pattern during the monitored summer period, with a general cooling trend towards the end of the season. Both air and water temperatures seem to be related to water level changes and variations in electrical conductivity. Furthermore, a ground temperature differentiation in the active layer is present. Main peaks and dips follow air temperature patterns, even in the lowermost and coldest horizon of the active layer. Compared to the record from the enclosing polygon rim the temperature differentiation in the polygonal depression is more distinct in the lower horizon and shows a wider temperature range. Soil moisture sensors show mostly constant over time moisture contents in the active layer. Surface soil horizons were driest, interrupted by some short term events, which point to abruptly increasing surface moisture (rainfall) that were also registered as a weaker increase in moisture in the deeper ... |
format |
Conference Object |
author |
Schirrmeister, Lutz Schneider, Andrea Wetterich, Sebastian Pestryakova, L. A. |
spellingShingle |
Schirrmeister, Lutz Schneider, Andrea Wetterich, Sebastian Pestryakova, L. A. Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland |
author_facet |
Schirrmeister, Lutz Schneider, Andrea Wetterich, Sebastian Pestryakova, L. A. |
author_sort |
Schirrmeister, Lutz |
title |
Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland |
title_short |
Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland |
title_full |
Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland |
title_fullStr |
Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland |
title_full_unstemmed |
Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland |
title_sort |
summer and annual environmental variations of two polygons in the indigirka-kolyma lowland |
publisher |
University of Lisbon and the University of Évora |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35769/ https://epic.awi.de/id/eprint/35769/3/Poster_EUCOP-IV_schirrmeister%282%29.pdf http://www.eucop4.org/ https://hdl.handle.net/10013/epic.43694 https://hdl.handle.net/10013/epic.43694.d003 |
genre |
permafrost Thermokarst Siberia |
genre_facet |
permafrost Thermokarst Siberia |
op_source |
EPIC34th European Conference on Permafrost, Evora, 2014-06-18-2014-06-21Evora, University of Lisbon and the University of Évora |
op_relation |
https://epic.awi.de/id/eprint/35769/3/Poster_EUCOP-IV_schirrmeister%282%29.pdf https://hdl.handle.net/10013/epic.43694.d003 Schirrmeister, L. orcid:0000-0001-9455-0596 , Schneider, A. , Wetterich, S. orcid:0000-0001-9234-1192 and Pestryakova, L. A. (2014) Summer and annual environmental variations of two polygons in the Indigirka-Kolyma lowland , 4th European Conference on Permafrost, Evora, 18 June 2014 - 21 June 2014 . hdl:10013/epic.43694 |
_version_ |
1810471664895393792 |