Observational Evidence for Desert Amplification Using Multiple Satellite Datasets

Abstract Desert amplification identified in recent studies has large uncertainties due to data paucity over remote deserts. Here we present observational evidence using multiple satellite-derived datasets that desert amplification is a real large-scale pattern of warming mode in near surface and low...

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Autores principales:	Nan Wei, Liming Zhou, Yongjiu Dai, Geng Xia, Wenjian Hua
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8650015fcc1f45c8aa939087efeada10
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spelling	oai:doaj.org-article:8650015fcc1f45c8aa939087efeada102021-12-02T11:41:00ZObservational Evidence for Desert Amplification Using Multiple Satellite Datasets10.1038/s41598-017-02064-w2045-2322https://doaj.org/article/8650015fcc1f45c8aa939087efeada102017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02064-whttps://doaj.org/toc/2045-2322Abstract Desert amplification identified in recent studies has large uncertainties due to data paucity over remote deserts. Here we present observational evidence using multiple satellite-derived datasets that desert amplification is a real large-scale pattern of warming mode in near surface and low-tropospheric temperatures. Trend analyses of three long-term temperature products consistently confirm that near-surface warming is generally strongest over the driest climate regions and this spatial pattern of warming maximizes near the surface, gradually decays with height, and disappears in the upper troposphere. Short-term anomaly analyses show a strong spatial and temporal coupling of changes in temperatures, water vapor and downward longwave radiation (DLR), indicating that the large increase in DLR drives primarily near surface warming and is tightly associated with increasing water vapor over deserts. Atmospheric soundings of temperature and water vapor anomalies support the results of the long-term temperature trend analysis and suggest that desert amplification is due to comparable warming and moistening effects of the troposphere. Likely, desert amplification results from the strongest water vapor feedbacks near the surface over the driest deserts, where the air is very sensitive to changes in water vapor and thus efficient in enhancing the longwave greenhouse effect in a warming climate.Nan WeiLiming ZhouYongjiu DaiGeng XiaWenjian HuaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nan Wei Liming Zhou Yongjiu Dai Geng Xia Wenjian Hua Observational Evidence for Desert Amplification Using Multiple Satellite Datasets
description	Abstract Desert amplification identified in recent studies has large uncertainties due to data paucity over remote deserts. Here we present observational evidence using multiple satellite-derived datasets that desert amplification is a real large-scale pattern of warming mode in near surface and low-tropospheric temperatures. Trend analyses of three long-term temperature products consistently confirm that near-surface warming is generally strongest over the driest climate regions and this spatial pattern of warming maximizes near the surface, gradually decays with height, and disappears in the upper troposphere. Short-term anomaly analyses show a strong spatial and temporal coupling of changes in temperatures, water vapor and downward longwave radiation (DLR), indicating that the large increase in DLR drives primarily near surface warming and is tightly associated with increasing water vapor over deserts. Atmospheric soundings of temperature and water vapor anomalies support the results of the long-term temperature trend analysis and suggest that desert amplification is due to comparable warming and moistening effects of the troposphere. Likely, desert amplification results from the strongest water vapor feedbacks near the surface over the driest deserts, where the air is very sensitive to changes in water vapor and thus efficient in enhancing the longwave greenhouse effect in a warming climate.
format	article
author	Nan Wei Liming Zhou Yongjiu Dai Geng Xia Wenjian Hua
author_facet	Nan Wei Liming Zhou Yongjiu Dai Geng Xia Wenjian Hua
author_sort	Nan Wei
title	Observational Evidence for Desert Amplification Using Multiple Satellite Datasets
title_short	Observational Evidence for Desert Amplification Using Multiple Satellite Datasets
title_full	Observational Evidence for Desert Amplification Using Multiple Satellite Datasets
title_fullStr	Observational Evidence for Desert Amplification Using Multiple Satellite Datasets
title_full_unstemmed	Observational Evidence for Desert Amplification Using Multiple Satellite Datasets
title_sort	observational evidence for desert amplification using multiple satellite datasets
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8650015fcc1f45c8aa939087efeada10
work_keys_str_mv	AT nanwei observationalevidencefordesertamplificationusingmultiplesatellitedatasets AT limingzhou observationalevidencefordesertamplificationusingmultiplesatellitedatasets AT yongjiudai observationalevidencefordesertamplificationusingmultiplesatellitedatasets AT gengxia observationalevidencefordesertamplificationusingmultiplesatellitedatasets AT wenjianhua observationalevidencefordesertamplificationusingmultiplesatellitedatasets
_version_	1718395470198341632

Observational Evidence for Desert Amplification Using Multiple Satellite Datasets

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