Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation.
The Tibetan Plateau and Siberia are both crucial regions in which the vegetation dynamics are sensitive to climate change. The variabilities in the normalized difference vegetation index (NDVI) over the two regions have been explored previously, but there have been few studies on the relationship of...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science (PLoS)
2020
|
Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pone.0239465 https://doaj.org/article/9246ec7ac8834f2fbeaf93da018c5c18 |
id |
ftdoajarticles:oai:doaj.org/article:9246ec7ac8834f2fbeaf93da018c5c18 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:9246ec7ac8834f2fbeaf93da018c5c18 2023-05-15T17:36:41+02:00 Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. Kejun He Ge Liu Junfang Zhao Jingxin Li 2020-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0239465 https://doaj.org/article/9246ec7ac8834f2fbeaf93da018c5c18 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0239465 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0239465 https://doaj.org/article/9246ec7ac8834f2fbeaf93da018c5c18 PLoS ONE, Vol 15, Iss 10, p e0239465 (2020) Medicine R Science Q article 2020 ftdoajarticles https://doi.org/10.1371/journal.pone.0239465 2022-12-31T07:49:27Z The Tibetan Plateau and Siberia are both crucial regions in which the vegetation dynamics are sensitive to climate change. The variabilities in the normalized difference vegetation index (NDVI) over the two regions have been explored previously, but there have been few studies on the relationship of the NDVI in the two regions. Using the GIMMS-NDVI, GHCN-CAMS and NCEP reanalysis datasets and statistical and physical diagnostic methods, we show that the summer (June, July and August) NDVI over the eastern Tibetan Plateau and Lake Baikal and its adjacent eastern region of Siberia have an in-phase co-variability, especially on an interannual timescale (with a correlation coefficient of 0.69 during the time period 1982-2014). Further analyses show that precipitation and the related cloud cover and solar radiation are responsible for the variability in the NDVI over the eastern Tibetan Plateau, whereas temperature has the more important role in modulating the variability in the NDVI over the Lake Baikal region. A dipole pattern prevails over the Tibetan Plateau-Lake Baikal region and reflects the anomalies in the intensity and location of the South Asian high and the northeast Asian blocking high. This dipole pattern simultaneously modulates precipitation over the eastern Tibetan Plateau and the temperature over the Lake Baikal region and leads to the co-variability of the NDVI between the two regions. A synergistic sea surface temperature index, which reflects sea surface temperature anomalies in the eastern tropical Pacific Ocean, the northwest Pacific Ocean, the northern Indian Ocean and the subtropical north Atlantic Ocean, appears to adjust this Tibetan Plateau-Lake Baikal dipole pattern and is therefore closely related to the co-variability of the NDVI between the eastern Tibetan Plateau and the Lake Baikal region. Our results suggest that vegetation dynamics may not be only a local phenomenon in some areas, but are also likely to remotely link with variations in vegetation over other regions. Article in Journal/Newspaper North Atlantic Siberia Directory of Open Access Journals: DOAJ Articles Pacific Indian PLOS ONE 15 10 e0239465 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Kejun He Ge Liu Junfang Zhao Jingxin Li Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. |
topic_facet |
Medicine R Science Q |
description |
The Tibetan Plateau and Siberia are both crucial regions in which the vegetation dynamics are sensitive to climate change. The variabilities in the normalized difference vegetation index (NDVI) over the two regions have been explored previously, but there have been few studies on the relationship of the NDVI in the two regions. Using the GIMMS-NDVI, GHCN-CAMS and NCEP reanalysis datasets and statistical and physical diagnostic methods, we show that the summer (June, July and August) NDVI over the eastern Tibetan Plateau and Lake Baikal and its adjacent eastern region of Siberia have an in-phase co-variability, especially on an interannual timescale (with a correlation coefficient of 0.69 during the time period 1982-2014). Further analyses show that precipitation and the related cloud cover and solar radiation are responsible for the variability in the NDVI over the eastern Tibetan Plateau, whereas temperature has the more important role in modulating the variability in the NDVI over the Lake Baikal region. A dipole pattern prevails over the Tibetan Plateau-Lake Baikal region and reflects the anomalies in the intensity and location of the South Asian high and the northeast Asian blocking high. This dipole pattern simultaneously modulates precipitation over the eastern Tibetan Plateau and the temperature over the Lake Baikal region and leads to the co-variability of the NDVI between the two regions. A synergistic sea surface temperature index, which reflects sea surface temperature anomalies in the eastern tropical Pacific Ocean, the northwest Pacific Ocean, the northern Indian Ocean and the subtropical north Atlantic Ocean, appears to adjust this Tibetan Plateau-Lake Baikal dipole pattern and is therefore closely related to the co-variability of the NDVI between the eastern Tibetan Plateau and the Lake Baikal region. Our results suggest that vegetation dynamics may not be only a local phenomenon in some areas, but are also likely to remotely link with variations in vegetation over other regions. |
format |
Article in Journal/Newspaper |
author |
Kejun He Ge Liu Junfang Zhao Jingxin Li |
author_facet |
Kejun He Ge Liu Junfang Zhao Jingxin Li |
author_sort |
Kejun He |
title |
Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. |
title_short |
Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. |
title_full |
Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. |
title_fullStr |
Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. |
title_full_unstemmed |
Co-variability of the summer NDVIs on the eastern Tibetan Plateau and in the Lake Baikal region: Associated climate factors and atmospheric circulation. |
title_sort |
co-variability of the summer ndvis on the eastern tibetan plateau and in the lake baikal region: associated climate factors and atmospheric circulation. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2020 |
url |
https://doi.org/10.1371/journal.pone.0239465 https://doaj.org/article/9246ec7ac8834f2fbeaf93da018c5c18 |
geographic |
Pacific Indian |
geographic_facet |
Pacific Indian |
genre |
North Atlantic Siberia |
genre_facet |
North Atlantic Siberia |
op_source |
PLoS ONE, Vol 15, Iss 10, p e0239465 (2020) |
op_relation |
https://doi.org/10.1371/journal.pone.0239465 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0239465 https://doaj.org/article/9246ec7ac8834f2fbeaf93da018c5c18 |
op_doi |
https://doi.org/10.1371/journal.pone.0239465 |
container_title |
PLOS ONE |
container_volume |
15 |
container_issue |
10 |
container_start_page |
e0239465 |
_version_ |
1766136247239049216 |