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Evapotranspiration intensifies over the conterminous United States

Publication ,  Journal Article
Szilagyi, J; Katul, GG; Parlange, MB
Published in: Journal of Water Resources Planning and Management
November 1, 2001

Using long-term (1948-1996) pan evaporation measurements, a 6% increase in warm-season (May-October) actual evapotranspiration (ET) is computed over the conterminous United States between 1949 and 1996 via the complementary hypothesis. This predicted increase in ET is in agreement with the measured precipitation increase for the same period if long-term wet-surface ET is assumed to be constant. Long-term relative humidity and air temperature measurements express an increase in mean air temperature and water vapor concentration but not a statistically significant change in vapor pressure deficit. The latter implies a smaller than 6% increase in actual warm-season ET. Water-balance estimates for six watersheds, covering about 50% of the land area of the contiguous states of the United States, indicate a 3% increase in annual ET over the same period.

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Published In

Journal of Water Resources Planning and Management

DOI

ISSN

0733-9496

Publication Date

November 1, 2001

Volume

127

Issue

6

Start / End Page

354 / 362

Related Subject Headings

  • Environmental Engineering
  • 4005 Civil engineering
  • 3707 Hydrology
  • 1402 Applied Economics
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
 

Citation

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Szilagyi, J., Katul, G. G., & Parlange, M. B. (2001). Evapotranspiration intensifies over the conterminous United States. Journal of Water Resources Planning and Management, 127(6), 354–362. https://doi.org/10.1061/(ASCE)0733-9496(2001)127:6(354)
Szilagyi, J., G. G. Katul, and M. B. Parlange. “Evapotranspiration intensifies over the conterminous United States.” Journal of Water Resources Planning and Management 127, no. 6 (November 1, 2001): 354–62. https://doi.org/10.1061/(ASCE)0733-9496(2001)127:6(354).
Szilagyi J, Katul GG, Parlange MB. Evapotranspiration intensifies over the conterminous United States. Journal of Water Resources Planning and Management. 2001 Nov 1;127(6):354–62.
Szilagyi, J., et al. “Evapotranspiration intensifies over the conterminous United States.” Journal of Water Resources Planning and Management, vol. 127, no. 6, Nov. 2001, pp. 354–62. Scopus, doi:10.1061/(ASCE)0733-9496(2001)127:6(354).
Szilagyi J, Katul GG, Parlange MB. Evapotranspiration intensifies over the conterminous United States. Journal of Water Resources Planning and Management. 2001 Nov 1;127(6):354–362.

Published In

Journal of Water Resources Planning and Management

DOI

ISSN

0733-9496

Publication Date

November 1, 2001

Volume

127

Issue

6

Start / End Page

354 / 362

Related Subject Headings

  • Environmental Engineering
  • 4005 Civil engineering
  • 3707 Hydrology
  • 1402 Applied Economics
  • 0907 Environmental Engineering
  • 0905 Civil Engineering