Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing
Evidence is presented from the satellite microwave remote sensing record that the timing of seasonal thawing and subsequent initiation of the growing season in early spring has advanced by approximately 8 days from 1988 to 2001 for the pan-Arctic basin and Alaska. These trends are highly variable ac...
Main Authors: | , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
ScholarWorks at University of Montana
2004
|
Subjects: | |
Online Access: | https://scholarworks.umt.edu/ntsg_pubs/140 https://doi.org/10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 https://scholarworks.umt.edu/context/ntsg_pubs/article/1139/viewcontent/McDonald_EA_04.pdf |
id |
ftunivmontana:oai:scholarworks.umt.edu:ntsg_pubs-1139 |
---|---|
record_format |
openpolar |
spelling |
ftunivmontana:oai:scholarworks.umt.edu:ntsg_pubs-1139 2024-09-09T19:17:02+00:00 Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing McDonald, Kyle C. Kimball, John S Njoku, Eni G. Zimmermann, Reiner Zhao, Maosheng 2004-01-01T08:00:00Z application/pdf https://scholarworks.umt.edu/ntsg_pubs/140 https://doi.org/10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 https://scholarworks.umt.edu/context/ntsg_pubs/article/1139/viewcontent/McDonald_EA_04.pdf unknown ScholarWorks at University of Montana https://scholarworks.umt.edu/ntsg_pubs/140 doi:10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 https://scholarworks.umt.edu/context/ntsg_pubs/article/1139/viewcontent/McDonald_EA_04.pdf © 2004 American Meteorological Society Numerical Terradynamic Simulation Group Publications text 2004 ftunivmontana https://doi.org/10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 2024-06-20T05:32:53Z Evidence is presented from the satellite microwave remote sensing record that the timing of seasonal thawing and subsequent initiation of the growing season in early spring has advanced by approximately 8 days from 1988 to 2001 for the pan-Arctic basin and Alaska. These trends are highly variable across the region, with North America experiencing a larger advance relative to Eurasia and the entire region. Interannual variability in the timing of spring thaw as detected from the remote sensing record corresponded directly to seasonal anomalies in mean atmospheric CO2 concentrations for the region, including the timing of the seasonal draw down of atmospheric CO2 from terrestrial net primary productivity (NPP) in spring, and seasonal maximum and minimum CO2 concentrations. The timing of the seasonal thaw for a given year was also found to be a significant (P < 0.01) predictor of the seasonal amplitude of atmospheric CO2 for the following year. These results imply that the timing of seasonal thawing in spring has a major impact on terrestrial NPP and net carbon exchange at high latitudes. The initiation of the growing season has also been occurring earlier, on average, over the time period addressed in this study and may be a major mechanism driving observed atmospheric CO2 seasonal cycle advances, vegetation greening, and enhanced productivity for the northern high latitudes. Text Arctic Basin Arctic Alaska University of Montana: ScholarWorks Arctic |
institution |
Open Polar |
collection |
University of Montana: ScholarWorks |
op_collection_id |
ftunivmontana |
language |
unknown |
description |
Evidence is presented from the satellite microwave remote sensing record that the timing of seasonal thawing and subsequent initiation of the growing season in early spring has advanced by approximately 8 days from 1988 to 2001 for the pan-Arctic basin and Alaska. These trends are highly variable across the region, with North America experiencing a larger advance relative to Eurasia and the entire region. Interannual variability in the timing of spring thaw as detected from the remote sensing record corresponded directly to seasonal anomalies in mean atmospheric CO2 concentrations for the region, including the timing of the seasonal draw down of atmospheric CO2 from terrestrial net primary productivity (NPP) in spring, and seasonal maximum and minimum CO2 concentrations. The timing of the seasonal thaw for a given year was also found to be a significant (P < 0.01) predictor of the seasonal amplitude of atmospheric CO2 for the following year. These results imply that the timing of seasonal thawing in spring has a major impact on terrestrial NPP and net carbon exchange at high latitudes. The initiation of the growing season has also been occurring earlier, on average, over the time period addressed in this study and may be a major mechanism driving observed atmospheric CO2 seasonal cycle advances, vegetation greening, and enhanced productivity for the northern high latitudes. |
format |
Text |
author |
McDonald, Kyle C. Kimball, John S Njoku, Eni G. Zimmermann, Reiner Zhao, Maosheng |
spellingShingle |
McDonald, Kyle C. Kimball, John S Njoku, Eni G. Zimmermann, Reiner Zhao, Maosheng Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing |
author_facet |
McDonald, Kyle C. Kimball, John S Njoku, Eni G. Zimmermann, Reiner Zhao, Maosheng |
author_sort |
McDonald, Kyle C. |
title |
Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing |
title_short |
Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing |
title_full |
Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing |
title_fullStr |
Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing |
title_full_unstemmed |
Variability in springtime thaw in the terrestrial high latitudes: Monitoring a major control on the biospheric assimilation of atmospheric CO2 with spaceborne microwave remote sensing |
title_sort |
variability in springtime thaw in the terrestrial high latitudes: monitoring a major control on the biospheric assimilation of atmospheric co2 with spaceborne microwave remote sensing |
publisher |
ScholarWorks at University of Montana |
publishDate |
2004 |
url |
https://scholarworks.umt.edu/ntsg_pubs/140 https://doi.org/10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 https://scholarworks.umt.edu/context/ntsg_pubs/article/1139/viewcontent/McDonald_EA_04.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Basin Arctic Alaska |
genre_facet |
Arctic Basin Arctic Alaska |
op_source |
Numerical Terradynamic Simulation Group Publications |
op_relation |
https://scholarworks.umt.edu/ntsg_pubs/140 doi:10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 https://scholarworks.umt.edu/context/ntsg_pubs/article/1139/viewcontent/McDonald_EA_04.pdf |
op_rights |
© 2004 American Meteorological Society |
op_doi |
https://doi.org/10.1175/1087-3562(2004)8<1:VISTIT>2.0.CO;2 |
_version_ |
1809757134304313344 |