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Stochastic Aspects of Lake Ontario Evaporation
Author(s) -
Yu Shaw L.,
Brutsaert Wilfried
Publication year - 1969
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr005i006p01256
Subject(s) - relative humidity , evaporation , environmental science , wind speed , atmospheric sciences , pan evaporation , potential evaporation , series (stratigraphy) , humidity , climatology , meteorology , geology , geography , paleontology
Time series analysis was carried out on long‐term monthly mean values of evaporation from Lake Ontario, which were generated in an earlier study, and on related meteorologic parameters. Correlation and spectral analyses showed that the annual cycle was dominant in all the time series. Evaporation is usually high in autumn and winter and low in spring and summer. A warming trend was observed in the air temperature and a drying trend in the relative humidity series. Except for the wind speed, no significant trend was found for the other time series. Cross correlation and cross‐spectral analyses showed a close relationship between evaporation anomalies and the anomalies of the other parameters. A first order Markov model adequately described the evaporation, air temperature, and relative humidity anomalies, whereas a second order model fitted the anomalies of wind speed and water surface temperature. Morton's [1967] water budget method yields higher evaporation estimates in the summer and lower estimates in the winter than the mass transfer estimates.