Spatial variations and long-term trends of potential evaporation in Canada

Abstract Assessing the status and trend of potential evaporation (PE) is essential for investigating the climate change impact on the terrestrial water cycle. Despite recent advances, evaluating climate change impacts on PE using pan evaporation (Epan) data in cold regions is hindered by the unavail...

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Autores principales:	Zhaoqin Li, Shusen Wang, Junhua Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/88a0a68f321e4d1e98d9cc359bfc9da8
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spelling	oai:doaj.org-article:88a0a68f321e4d1e98d9cc359bfc9da82021-12-02T12:03:16ZSpatial variations and long-term trends of potential evaporation in Canada10.1038/s41598-020-78994-92045-2322https://doaj.org/article/88a0a68f321e4d1e98d9cc359bfc9da82020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78994-9https://doaj.org/toc/2045-2322Abstract Assessing the status and trend of potential evaporation (PE) is essential for investigating the climate change impact on the terrestrial water cycle. Despite recent advances, evaluating climate change impacts on PE using pan evaporation (Epan) data in cold regions is hindered by the unavailability of Epan measurements in cold seasons due to the freezing of water and sparse spatial distribution of sites. This study generated long-term PE datasets in Canada for 1979–2016 by integrating the dynamic evolutions of water–ice–snow processes into estimation in the Ecological Assimilation of Land and Climate Observations (EALCO) model. The datasets were compared with Epan before the spatial variations and trends were analyzed. Results show that EALCO PE and Epan measurements demonstrate similar seasonal variations and trends in warm seasons in most areas. Annual PE in Canada varied from 100 mm in the Northern Arctic to approximately 1000 mm in southern Canadian Prairies, southern Ontario, and East Coast, with about 600 mm for the entire landmass. Annual PE shows an increasing trend at a rate of 1.5–4 mm/year in the Northern Arctic, East, and West Canada. The increase is primarily associated with the elevated air temperature and downward longwave and shortwave radiation, with some regions contributed by augmented wind speed. The increase of annual PE is mainly attributed to the augmentation of PE in warm seasons.Zhaoqin LiShusen WangJunhua LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhaoqin Li Shusen Wang Junhua Li Spatial variations and long-term trends of potential evaporation in Canada
description	Abstract Assessing the status and trend of potential evaporation (PE) is essential for investigating the climate change impact on the terrestrial water cycle. Despite recent advances, evaluating climate change impacts on PE using pan evaporation (Epan) data in cold regions is hindered by the unavailability of Epan measurements in cold seasons due to the freezing of water and sparse spatial distribution of sites. This study generated long-term PE datasets in Canada for 1979–2016 by integrating the dynamic evolutions of water–ice–snow processes into estimation in the Ecological Assimilation of Land and Climate Observations (EALCO) model. The datasets were compared with Epan before the spatial variations and trends were analyzed. Results show that EALCO PE and Epan measurements demonstrate similar seasonal variations and trends in warm seasons in most areas. Annual PE in Canada varied from 100 mm in the Northern Arctic to approximately 1000 mm in southern Canadian Prairies, southern Ontario, and East Coast, with about 600 mm for the entire landmass. Annual PE shows an increasing trend at a rate of 1.5–4 mm/year in the Northern Arctic, East, and West Canada. The increase is primarily associated with the elevated air temperature and downward longwave and shortwave radiation, with some regions contributed by augmented wind speed. The increase of annual PE is mainly attributed to the augmentation of PE in warm seasons.
format	article
author	Zhaoqin Li Shusen Wang Junhua Li
author_facet	Zhaoqin Li Shusen Wang Junhua Li
author_sort	Zhaoqin Li
title	Spatial variations and long-term trends of potential evaporation in Canada
title_short	Spatial variations and long-term trends of potential evaporation in Canada
title_full	Spatial variations and long-term trends of potential evaporation in Canada
title_fullStr	Spatial variations and long-term trends of potential evaporation in Canada
title_full_unstemmed	Spatial variations and long-term trends of potential evaporation in Canada
title_sort	spatial variations and long-term trends of potential evaporation in canada
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/88a0a68f321e4d1e98d9cc359bfc9da8
work_keys_str_mv	AT zhaoqinli spatialvariationsandlongtermtrendsofpotentialevaporationincanada AT shusenwang spatialvariationsandlongtermtrendsofpotentialevaporationincanada AT junhuali spatialvariationsandlongtermtrendsofpotentialevaporationincanada
_version_	1718394760721334272

Spatial variations and long-term trends of potential evaporation in Canada

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