Estimating the potential evapotranspiration of Bulgaria using a high-resolution regional climate model

Anwar, SA; Malcheva, K; Srivastava, A

Estimating the potential evapotranspiration of Bulgaria using a high-resolution regional climate model

Anwar, SA Malcheva, K Srivastava, A

Permalink

Publisher:: SPRINGER WIEN
Publication Type:: Journal Article
Citation:: Theoretical and Applied Climatology, 2023, 152, (3-4), pp. 1175-1188
Issue Date:: 2023-05-01

Closed Access

	Filename	Description	Size
	s00704-023-04438-9 (1).pdf	Published version	3.17 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Anwar, SA
dc.contributor.author	Malcheva, K
dc.contributor.author	Srivastava, A https://orcid.org/0000-0002-3963-265X
dc.date.accessioned	2024-02-13T03:03:26Z
dc.date.available	2024-02-13T03:03:26Z
dc.date.issued	2023-05-01
dc.identifier.citation	Theoretical and Applied Climatology, 2023, 152, (3-4), pp. 1175-1188
dc.identifier.issn	0177-798X
dc.identifier.issn	1434-4483
dc.identifier.uri	http://hdl.handle.net/10453/175639
dc.description.abstract	Observations made in situ by land evaporators are a useful data source for monitoring potential evapotranspiration (PET). The National Institute of Meteorology and Hydrology of Bulgaria operates the conventional small evaporators, which are sensitive to the site’s environment, local, and geographic factors. Furthermore, there are just a few sources of reliable long-term observational data available across the region. Therefore, developing a regional map or predicting the PET at a specific location both can benefit from using regional climate models. This problem was addressed by simulating the PET using the Hargreaves-Samani (HS) approach with the regional climate model (RegCM4). The RegCM4 with 25-km grid spacing for the area of Bulgaria from 1988 to 2010 was downscaled using ERA-Interim reanalysis. The original HS formula and its calibrated version were evaluated with respect to the Climate Research Unit (CRU). Results indicated that adjusting the radiation coefficient is far more efficient than adjusting the temperature coefficient. In addition, the calibrated HS formula, as compared to the default HS formula, consistently performs better at predicting the PET with respect to the CRU, as shown by a significantly smaller bias and a more accurate representation of the climatological yearly cycle. As a result, the RegCM4 can be used as one of the potential alternatives to create a regional map of PET of Bulgaria utilizing the calibrated version of the HS equation, both in the historical and under different future scenarios.
dc.language	English
dc.publisher	SPRINGER WIEN
dc.relation.ispartof	Theoretical and Applied Climatology
dc.relation.isbasedon	10.1007/s00704-023-04438-9
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0401 Atmospheric Sciences
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.classification	3701 Atmospheric sciences
dc.subject.classification	3702 Climate change science
dc.subject.classification	4101 Climate change impacts and adaptation
dc.title	Estimating the potential evapotranspiration of Bulgaria using a high-resolution regional climate model
dc.type	Journal Article
utslib.citation.volume	152
utslib.for	0401 Atmospheric Sciences
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2024-02-13T03:03:25Z
pubs.issue	3-4
pubs.publication-status	Published
pubs.volume	152
utslib.citation.issue	3-4

Abstract:

Observations made in situ by land evaporators are a useful data source for monitoring potential evapotranspiration (PET). The National Institute of Meteorology and Hydrology of Bulgaria operates the conventional small evaporators, which are sensitive to the site’s environment, local, and geographic factors. Furthermore, there are just a few sources of reliable long-term observational data available across the region. Therefore, developing a regional map or predicting the PET at a specific location both can benefit from using regional climate models. This problem was addressed by simulating the PET using the Hargreaves-Samani (HS) approach with the regional climate model (RegCM4). The RegCM4 with 25-km grid spacing for the area of Bulgaria from 1988 to 2010 was downscaled using ERA-Interim reanalysis. The original HS formula and its calibrated version were evaluated with respect to the Climate Research Unit (CRU). Results indicated that adjusting the radiation coefficient is far more efficient than adjusting the temperature coefficient. In addition, the calibrated HS formula, as compared to the default HS formula, consistently performs better at predicting the PET with respect to the CRU, as shown by a significantly smaller bias and a more accurate representation of the climatological yearly cycle. As a result, the RegCM4 can be used as one of the potential alternatives to create a regional map of PET of Bulgaria utilizing the calibrated version of the HS equation, both in the historical and under different future scenarios.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/175639