Revising contemporary heat flux estimates for the Lena River, Northern Eurasia
The Lena River (Lena R.) heat flux affects the Laptev Sea hydrology. Published long-term estimates range from 14.0 to 15.7 EJ·a−1, based on data from Kyusyur, at the river outlet. A novel daily stream temperature (Tw) dataset was used to evaluate contemporary Lena R. heat flux, which is 16.4 ± 2.7 E...
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ftawi:oai:epic.awi.de:51553 2023-05-15T17:07:17+02:00 Revising contemporary heat flux estimates for the Lena River, Northern Eurasia Tananaev, N. I. Georgiadi, A. G. Fofonova, Vera 2019-10-01 https://epic.awi.de/id/eprint/51553/ https://iwaponline.com/hr/article/50/5/1440/69889/Revising-contemporary-heat-flux-estimates-for-the https://hdl.handle.net/10013/epic.7b017a98-4706-422e-bcdf-5964e64e834a unknown I W A PUBLISHING Tananaev, N. I. , Georgiadi, A. G. and Fofonova, V. orcid:0000-0002-5956-1844 (2019) Revising contemporary heat flux estimates for the Lena River, Northern Eurasia , Hydrology Research . doi:10.2166/nh.2019.062 <https://doi.org/10.2166/nh.2019.062> , hdl:10013/epic.7b017a98-4706-422e-bcdf-5964e64e834a EPIC3Hydrology Research, I W A PUBLISHING, ISSN: 0029-1277 Article isiRev 2019 ftawi https://doi.org/10.2166/nh.2019.062 2021-12-24T15:45:22Z The Lena River (Lena R.) heat flux affects the Laptev Sea hydrology. Published long-term estimates range from 14.0 to 15.7 EJ·a−1, based on data from Kyusyur, at the river outlet. A novel daily stream temperature (Tw) dataset was used to evaluate contemporary Lena R. heat flux, which is 16.4 ± 2.7 EJ·a−1 (2002–2011), confirming upward trends in both Tw and water runoff. Our field data from Kyusyur, however, reveal a significant negative bias, −0.8 °C in our observations, in observed Tw values from Kyusyur compared to the cross-section average Tw. Minor Lena R. tributaries discharge colder water during July–September, forming a cold jet affecting Kyusyur Tw data. Major Tw negative peaks mostly coincide with flood peaks on the Yeremeyka River, one of these tributaries. This negative bias was accounted for in our reassessment. Revised contemporary Lena R. heat flux is 17.6 ± 2.8 EJ·a−1 (2002–2011) and is constrained from above at 26.9 EJ·a−1 using data from Zhigansk, approximately 500 km upstream Kyusyur. Heat flux is controlled by stream temperature in June, during the freshet period, while from late July to mid-September, water runoff is a dominant factor. Article in Journal/Newspaper laptev Laptev Sea lena river Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Laptev Sea Zhigansk ENVELOPE(123.374,123.374,66.766,66.766) Kyusyur ENVELOPE(127.364,127.364,70.688,70.688) Hydrology Research 50 5 1440 1452 |
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 |
The Lena River (Lena R.) heat flux affects the Laptev Sea hydrology. Published long-term estimates range from 14.0 to 15.7 EJ·a−1, based on data from Kyusyur, at the river outlet. A novel daily stream temperature (Tw) dataset was used to evaluate contemporary Lena R. heat flux, which is 16.4 ± 2.7 EJ·a−1 (2002–2011), confirming upward trends in both Tw and water runoff. Our field data from Kyusyur, however, reveal a significant negative bias, −0.8 °C in our observations, in observed Tw values from Kyusyur compared to the cross-section average Tw. Minor Lena R. tributaries discharge colder water during July–September, forming a cold jet affecting Kyusyur Tw data. Major Tw negative peaks mostly coincide with flood peaks on the Yeremeyka River, one of these tributaries. This negative bias was accounted for in our reassessment. Revised contemporary Lena R. heat flux is 17.6 ± 2.8 EJ·a−1 (2002–2011) and is constrained from above at 26.9 EJ·a−1 using data from Zhigansk, approximately 500 km upstream Kyusyur. Heat flux is controlled by stream temperature in June, during the freshet period, while from late July to mid-September, water runoff is a dominant factor. |
format |
Article in Journal/Newspaper |
author |
Tananaev, N. I. Georgiadi, A. G. Fofonova, Vera |
spellingShingle |
Tananaev, N. I. Georgiadi, A. G. Fofonova, Vera Revising contemporary heat flux estimates for the Lena River, Northern Eurasia |
author_facet |
Tananaev, N. I. Georgiadi, A. G. Fofonova, Vera |
author_sort |
Tananaev, N. I. |
title |
Revising contemporary heat flux estimates for the Lena River, Northern Eurasia |
title_short |
Revising contemporary heat flux estimates for the Lena River, Northern Eurasia |
title_full |
Revising contemporary heat flux estimates for the Lena River, Northern Eurasia |
title_fullStr |
Revising contemporary heat flux estimates for the Lena River, Northern Eurasia |
title_full_unstemmed |
Revising contemporary heat flux estimates for the Lena River, Northern Eurasia |
title_sort |
revising contemporary heat flux estimates for the lena river, northern eurasia |
publisher |
I W A PUBLISHING |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/51553/ https://iwaponline.com/hr/article/50/5/1440/69889/Revising-contemporary-heat-flux-estimates-for-the https://hdl.handle.net/10013/epic.7b017a98-4706-422e-bcdf-5964e64e834a |
long_lat |
ENVELOPE(123.374,123.374,66.766,66.766) ENVELOPE(127.364,127.364,70.688,70.688) |
geographic |
Laptev Sea Zhigansk Kyusyur |
geographic_facet |
Laptev Sea Zhigansk Kyusyur |
genre |
laptev Laptev Sea lena river |
genre_facet |
laptev Laptev Sea lena river |
op_source |
EPIC3Hydrology Research, I W A PUBLISHING, ISSN: 0029-1277 |
op_relation |
Tananaev, N. I. , Georgiadi, A. G. and Fofonova, V. orcid:0000-0002-5956-1844 (2019) Revising contemporary heat flux estimates for the Lena River, Northern Eurasia , Hydrology Research . doi:10.2166/nh.2019.062 <https://doi.org/10.2166/nh.2019.062> , hdl:10013/epic.7b017a98-4706-422e-bcdf-5964e64e834a |
op_doi |
https://doi.org/10.2166/nh.2019.062 |
container_title |
Hydrology Research |
container_volume |
50 |
container_issue |
5 |
container_start_page |
1440 |
op_container_end_page |
1452 |
_version_ |
1766062662545833984 |