Physical mechanism of spring and early summer drought over North America associated with the boreal warming

Abstract Drought during the early vegetation growing season (spring through early summer) is a severe natural hazard in the large cropland over North America. Given the recent increasing severity of climate change manifested as surface warming, there has been a growing interest in how warming affect...

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Autores principales:	Woosuk Choi, Kwang-Yul Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fc2b80c92a694f9c9c6415da6cf8f695
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spelling	oai:doaj.org-article:fc2b80c92a694f9c9c6415da6cf8f6952021-12-02T15:07:48ZPhysical mechanism of spring and early summer drought over North America associated with the boreal warming10.1038/s41598-018-25932-52045-2322https://doaj.org/article/fc2b80c92a694f9c9c6415da6cf8f6952018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25932-5https://doaj.org/toc/2045-2322Abstract Drought during the early vegetation growing season (spring through early summer) is a severe natural hazard in the large cropland over North America. Given the recent increasing severity of climate change manifested as surface warming, there has been a growing interest in how warming affects drought and the prospect of drought. Here we show the impact of boreal warming on the spring and early summer drought over North America using Cyclostationary Empirical Orthogonal Function analysis. Northern Hemispheric warming, the leading mode of the surface air temperature variability, has led to a decrease in precipitation, evaporation and moisture transport over the central plain of North America. From a quantitative assessment of atmospheric water budget, precipitation has decreased more than evaporation and moisture transport, resulting in increased (decreased) moisture in the lower troposphere (land surface). Despite the increased moisture content, relative humidity has decreased due to the increased saturation specific humidity arising from the lower-tropospheric warming. The anomaly patterns of the soil moisture and Palmer Drought Severity Index resemble that of the anomalous relative humidity. Results of the present study suggest a credible insight that drought in the main cropland will intensify if the anthropogenic warming continues, exacerbating vulnerability of drought.Woosuk ChoiKwang-Yul KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Woosuk Choi Kwang-Yul Kim Physical mechanism of spring and early summer drought over North America associated with the boreal warming
description	Abstract Drought during the early vegetation growing season (spring through early summer) is a severe natural hazard in the large cropland over North America. Given the recent increasing severity of climate change manifested as surface warming, there has been a growing interest in how warming affects drought and the prospect of drought. Here we show the impact of boreal warming on the spring and early summer drought over North America using Cyclostationary Empirical Orthogonal Function analysis. Northern Hemispheric warming, the leading mode of the surface air temperature variability, has led to a decrease in precipitation, evaporation and moisture transport over the central plain of North America. From a quantitative assessment of atmospheric water budget, precipitation has decreased more than evaporation and moisture transport, resulting in increased (decreased) moisture in the lower troposphere (land surface). Despite the increased moisture content, relative humidity has decreased due to the increased saturation specific humidity arising from the lower-tropospheric warming. The anomaly patterns of the soil moisture and Palmer Drought Severity Index resemble that of the anomalous relative humidity. Results of the present study suggest a credible insight that drought in the main cropland will intensify if the anthropogenic warming continues, exacerbating vulnerability of drought.
format	article
author	Woosuk Choi Kwang-Yul Kim
author_facet	Woosuk Choi Kwang-Yul Kim
author_sort	Woosuk Choi
title	Physical mechanism of spring and early summer drought over North America associated with the boreal warming
title_short	Physical mechanism of spring and early summer drought over North America associated with the boreal warming
title_full	Physical mechanism of spring and early summer drought over North America associated with the boreal warming
title_fullStr	Physical mechanism of spring and early summer drought over North America associated with the boreal warming
title_full_unstemmed	Physical mechanism of spring and early summer drought over North America associated with the boreal warming
title_sort	physical mechanism of spring and early summer drought over north america associated with the boreal warming
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/fc2b80c92a694f9c9c6415da6cf8f695
work_keys_str_mv	AT woosukchoi physicalmechanismofspringandearlysummerdroughtovernorthamericaassociatedwiththeborealwarming AT kwangyulkim physicalmechanismofspringandearlysummerdroughtovernorthamericaassociatedwiththeborealwarming
_version_	1718388426799054848

Physical mechanism of spring and early summer drought over North America associated with the boreal warming

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