Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)

The trend of wetting or drying is an important metric of regional and global climate change. Based on daily meteorological data during 1951–2018 from 10 stations in arid regions of North China, the performances of two indicators, relative humidity (RH) and actual water vapour pressure (ea), in evalu...

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Autores principales:	Qi Wei, Junzeng Xu, Linxian Liao, Yanmei Yu, Weixuan Liu, Jing Zhou, Yimin Ding
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Relative humidity Actual water vapour pressure Climate change Precipitation Wetting or drying Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/0a1502bb3ce6498086a1df6f82dfd1a4
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spelling	oai:doaj.org-article:0a1502bb3ce6498086a1df6f82dfd1a42021-12-01T04:33:18ZIndicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)1470-160X10.1016/j.ecolind.2020.107043https://doaj.org/article/0a1502bb3ce6498086a1df6f82dfd1a42021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20309821https://doaj.org/toc/1470-160XThe trend of wetting or drying is an important metric of regional and global climate change. Based on daily meteorological data during 1951–2018 from 10 stations in arid regions of North China, the performances of two indicators, relative humidity (RH) and actual water vapour pressure (ea), in evaluating the trends of air humidification are investigated. Results show that annual RH decreases by 0–0.10% yr−1 during the past decades in almost all (90%) stations, whereas annual ea presents increasing trends in 40% of stations and decreasing trends in the other 60% stations. Therefore, contrasting results are observed in the trends of air humidity reflected RH and ea. Specifically, stations getting significantly drying as indicated by RH, it is tend to getting less drying or even wetting as indicated by ea. These results suggest that it tend to give a misleading conclusion with the trends of RH as indicator in evaluating the trends of regional or global wetting or drying, due to the reduction in RH caused by the accompanying temperature rising under global warming. The other indicator ea is more consistent with the precipitation changes, and suitable for trending analyses of air humidification under such circumstance. Further researches should be done in a larger scale arid region and in different seasons, to investigate the differences in the trends of air humidification indicated by RH and ea, and discuss the response of the changes of wetting or drying to the varied meteorological factors.Qi WeiJunzeng XuLinxian LiaoYanmei YuWeixuan LiuJing ZhouYimin DingElsevierarticleRelative humidityActual water vapour pressureClimate changePrecipitationWetting or dryingEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107043- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Relative humidity Actual water vapour pressure Climate change Precipitation Wetting or drying Ecology QH540-549.5
spellingShingle	Relative humidity Actual water vapour pressure Climate change Precipitation Wetting or drying Ecology QH540-549.5 Qi Wei Junzeng Xu Linxian Liao Yanmei Yu Weixuan Liu Jing Zhou Yimin Ding Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)
description	The trend of wetting or drying is an important metric of regional and global climate change. Based on daily meteorological data during 1951–2018 from 10 stations in arid regions of North China, the performances of two indicators, relative humidity (RH) and actual water vapour pressure (ea), in evaluating the trends of air humidification are investigated. Results show that annual RH decreases by 0–0.10% yr−1 during the past decades in almost all (90%) stations, whereas annual ea presents increasing trends in 40% of stations and decreasing trends in the other 60% stations. Therefore, contrasting results are observed in the trends of air humidity reflected RH and ea. Specifically, stations getting significantly drying as indicated by RH, it is tend to getting less drying or even wetting as indicated by ea. These results suggest that it tend to give a misleading conclusion with the trends of RH as indicator in evaluating the trends of regional or global wetting or drying, due to the reduction in RH caused by the accompanying temperature rising under global warming. The other indicator ea is more consistent with the precipitation changes, and suitable for trending analyses of air humidification under such circumstance. Further researches should be done in a larger scale arid region and in different seasons, to investigate the differences in the trends of air humidification indicated by RH and ea, and discuss the response of the changes of wetting or drying to the varied meteorological factors.
format	article
author	Qi Wei Junzeng Xu Linxian Liao Yanmei Yu Weixuan Liu Jing Zhou Yimin Ding
author_facet	Qi Wei Junzeng Xu Linxian Liao Yanmei Yu Weixuan Liu Jing Zhou Yimin Ding
author_sort	Qi Wei
title	Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)
title_short	Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)
title_full	Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)
title_fullStr	Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)
title_full_unstemmed	Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)
title_sort	indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: relative humidity (rh) vs. actual water vapour pressure (ea)
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/0a1502bb3ce6498086a1df6f82dfd1a4
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Indicators for evaluating trends of air humidification in arid regions under circumstance of climate change: Relative humidity (RH) vs. Actual water vapour pressure (ea)

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