Articles | Volume 26, issue 7
https://doi.org/10.5194/hess-26-1745-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-26-1745-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Apr 2022
Research article |
| 06 Apr 2022
| 06 Apr 2022
Testing a maximum evaporation theory over saturated land: implications for potential evaporation estimation
Zhuoyi Tu
State Key Laboratory of Hydroscience and Engineering, Department of
Hydraulic Engineering, Tsinghua University, Beijing, China
State Key Laboratory of Hydroscience and Engineering, Department of
Hydraulic Engineering, Tsinghua University, Beijing, China
Michael L. Roderick
Research School of Earth Sciences, Australian National University,
Canberra, ACT, Australia
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Cited articles
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop Evapotranspiration – Guidelines for computing crop water requirements, FAO
Irrigation and Drainage Paper No. 56, FAO – Food and Agriculture Organization of the United Nations, Rome, Italy, https://www.fao.org/3/X0490E/x0490e00.htm#Contents (last access: 4 April 2022), 1998.
Aminzadeh, M., Roderick, M. L., and Or, D.: A generalized complementary
relationship between actual and potential evaporation defined by a reference
surface temperature, Water. Resour. Res., 52, 385–406, https://doi.org/10.1002/2015WR017969, 2016.
Andreas, E. L., Jordan, R. E., Mahrt, L., and Vickers, D.: Estimating the
Bowen ratio over the open and ice-covered ocean, J. Geophys. Res.-Oceans, 118, 4334–4345, https://doi.org/10.1002/jgrc.20295, 2013.
Bowen, I. S.: The ratio of heat losses by conduction and by evaporation from
any water surface, Phys. Rev., 27, 779, https://doi.org/10.1103/PhysRev.27.779, 1926.
Brutsaert, W.: On a derivable formula for long-wave radiation from clear skies, Water. Resour. Res., 11, 742–744, https://doi.org/10.1029/WR011i005p00742, 1975.
Brutsaert, W.: Hydrology: an introduction, Cambridge University Press,
Cambridge, UK, ISBN 9780521824798, 2005.
Brutsaert, W.: A generalized complementary principle with physical constraints for land-surface evaporation, Water. Resour. Res., 51, 8087–8093, https://doi.org/10.1002/2015WR017720, 2015.
Donohue, R. J., McVicar, T. R., and Roderick, M. L.: Assessing the ability
of potential evaporation formulations to capture the dynamics in evaporative
demand within a changing climate, J. Hydrol., 386, 186–197,
https://doi.org/10.1016/j.jhydrol.2010.03.020, 2010.
Ershadi, A., McCabe, M. F., Evans, J. P., Chaney, N. W., and Wood, E. F.:
Multi-site evaluation of terrestrial evaporation models using FLUXNET data, Agr. Forest Meteorol., 187, 46–61, https://doi.org/10.1016/j.agrformet.2013.11.008, 2014.
FLUXNET: FLUXNET2015 Dataset, http://fluxnet.fluxdata.org/data/fluxnet2015-dataset/ (last access: 12 November 2020), 2016.
Granger, R. J.: An examination of the concept of potential evaporation, J.
Hydrol., 111, 9–19, https://doi.org/10.1016/0022-1694(89)90248-5, 1989.
Guo, X., Liu, H., and Yang, K.: On the application of the Priestley–Taylor
relation on sub-daily time scales, Bound.-Lay. Meteorol., 156, 489–499, https://doi.org/10.1007/s10546-015-0031-y, 2015.
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., Chiara, G. D., Dahlgren, P., Dee, D., Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer, A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková, M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., Rosnay, P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.: The ERA5 global reanalysis, Q. J. Roy. Meteorol. Soc., 146, 1999–2049, https://doi.org/10.1002/qj.3803, 2020.
Jasechko, S., Sharp, Z. D., Gibson, J. J., Birks, S. J., Yi, Y., and
Fawcett, P. J.: Terrestrial water fluxes dominated by transpiration, Nature, 496, 347–350, https://doi.org/10.1038/nature11983, 2013.
Kato, S., Rose, F. G., Rutan, D. A., Thorsen, T. J., Loeb, N. G., Doelling, D., Huang, X., Smith, W. L., Su, W., and Ham, S.: Surface irradiances of edition 4.0 Clouds and the Earth' s Radiant Energy System (CERES) Energy Balanced and Filled (EBAF) data product, J. Climate, 31, 4501–4527, https://doi.org/10.1175/JCLI-D-17-0523.1, 2018.
Kleidon, A. and Renner, M.: An Explanation for the Different Climate Sensitivities of Land and Ocean Surfaces Based on the Diurnal Cycle, Earth
Syst. Dynam., 8, 849–864, https://doi.org/10.5194/esd-8-849-2017, 2017.
Lee, X., Massman, W., and Law, B.: Handbook of micrometeorology: a guide for
surface flux measurement and analysis, Vol. 29, Springer Science & Business Media, ISBN 1402022646, 2004.
Lhomme, J. P.: A theoretical basis for the Priestley-Taylor coefficient,
Bound.-Lay. Meteorol., 82, 179–191, https://doi.org/10.1023/A:1000281114105, 1997.
Lian, X., Piao, S., Huntingford, C., Li, Y., Zeng, Z., Wang, X., Ciais, P.,
McVicar, T., Peng, S., Ottlé, C., Yang, H., Yang, Y., Zhang, Y., and
Wang, T.: Partitioning global land evapotranspiration using CMIP5 models
constrained by observations, Nat. Clim. Change, 8, 640–646, 2018.
Maes, W. H., Gentine, P., Verhoest, N. E., and Miralles, D. G.: Potential
evaporation at eddy-covariance sites across the globe, Hydrol. Earth. Syst.
Sci., 23, 925–948, https://doi.org/10.5194/hess-23-925-2019, 2019.
Milly, P. C. D.: A refinement of the combination equations for evaporation,
Surv. Geophys., 12, 145–154, https://doi.org/10.1007/BF01903416, 1991.
Milly, P. C. D. and Dunne, K. A.: Potential evapotranspiration and continental drying, Nat. Clim. Change, 6, 946–949, https://doi.org/10.1038/nclimate3046, 2016.
Monin, A. S. and Obukhov, A. M.: Basic laws of turbulent mixing in the surface layer of the atmosphere, Contrib. Geophys. Inst. Acad. Sci. USSR, 151, e187, 1954.
Monteith, J. L.: Evaporation and environment, Symp. Soc. Exp. Biol., 19,
205–234, 1965.
Monteith, J. L. and Unsworth, M.: Principles of environmental physics:
plants, animals, and the atmosphere, Academic Press, San Diego, USA, ISBN 0123869102, 2013.
Nash, J. E.: Potential evaporation and “the complementary relationship”,
J. Hydrol., 111, 1–7, https://doi.org/10.1016/0022-1694(89)90247-3, 1989.
Pastorello, G., Trotta, C., Canfora, E., Chu, H., Christianson, G., Cheah, Y., Poindexter, C., Chen, J., Elbashandy, A., Humphrey, M., Isaac, P., Polidori, D., Reichstein, M., Ribeca, A., Ingen, C., Vuichard, N., Zhang, L., Amiro, B., Ammann, C., Arain, M. A., Ardö, J., Arkebauer, T., Arndt, S. K., Arriga, N., Aubinet, M., Aurela, M., Baldocchi, D., Barr, A., Beamesderfer, E., Marchesini, L. B., Bergeron, O., Beringer, J., Bernhofer, C., Berveiller, D., and Billesbach, D.: The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data, Sci. Data, 7, 1–27, https://doi.org/10.1038/s41597-020-0534-3, 2020.
Paw U, K. T., Baldocchi, D. D., Meyers, T. P., and Wilson, K. B.: Correction of eddy-covariance measurements incorporating both advective effects and
density fluxes, Bound.-Lay. Meteorol., 97, 487–511, https://doi.org/10.1023/A:1002786702909, 2000.
Penman, H. L.: Natural evaporation from open water, bare soil and grass, P. Roy. Soc. Lond. A, 193, 120–145, https://doi.org/10.1098/rspa.1948.0037,
1948.
Philip, J. R.: A physical bound on the Bowen ratio, J. Clim. Appl. Meteorol., 26, 1043–1045, https://doi.org/10.1175/1520-0450(1987)026<1043:APBOTB>2.0.CO;2, 1987.
Priestley, C. H. B. and Taylor, R. J.: On the assessment of surface heat
flux and evaporation using large-scale parameters, Mon. Weather. Rev., 100,
81–92, https://doi.org/10.1175/1520-0493(1972)100<0081:OTAOSH>2.3.CO;2, 1972.
Rodell, M., Houser, P. R., Jambor, U., Gottschalck, J., Mitchell, K., Meng, C. J., Arsenault, K., Cosgrove, B., Radakovich, J., Bosilovich, M., Entin, J. K., Walker, J. P., Lohmann, D., and Toll, D.: The Global Land Data Assimilation System, B. Am. Meteorol. Soc., 85, 381–394, https://doi.org/10.1175/BAMS-85-3-381, 2004.
Roderick, M. L., Greve, P., and Farquhar, G. D.: On the assessment of
aridity with changes in atmospheric CO2, Water. Resour. Res., 51,
5450–5463, https://doi.org/10.1002/2015WR017031, 2015.
Scheff, J. and Frierson, D. M. W.: Scaling potential evapotranspiration with greenhouse warming, J. Climate, 27, 1539–1558, https://doi.org/10.1175/JCLI-D-13-00233.1, 2014.
Schellekens, J., Dutra, E., Martinez-de la Torre, A., Balsamo, G., van Dijk,
A., Weiland, F. S., Minvielle, M., Calvet, J. C., Decharme, B., Eisner, S.,
Fink, G., Florke, M., Pessenteiner, S., van Beek, R., Polcher, J., Beck, H.,
Orth, R., Calton, B., Burke, S., Dorigo, W., and Weedon, G. P.: A global
water resources ensemble of hydrological models: the eartH2Observe Tier-1
dataset, Earth. Syst. Sci. Data, 9, 389–413, https://doi.org/10.5194/essd-9-389-2017, 2017.
Shakespeare, C. J. and Roderick, M. L.: The clear-sky downwelling longwave radiation at the surface in current and future climates, Q. J. Roy. Meteorol. Soc., 147, 4251–4268, https://doi.org/10.1002/qj.4176, 2021.
Sheffield, J., Goteti, G., and Wood, E. F.: Development of a 50-year high-resolution global dataset of meteorological forcings for land surface
modeling, J. Climate, 19, 3088–3111, https://doi.org/10.1175/JCLI3790.1, 2006.
Sheffield, J., Wood, E. F., and Roderick, M. L.: Little change in global
drought over the past 60 years, Nature, 491, 435–438, https://doi.org/10.1038/nature11575, 2012.
Shuttleworth, W. J.: Evaporation, in Handbook of Hydrology, chap. 4, edited
by: Maidment, D. R., McGraw-Hill Education, New York, USA, ISBN 0070397325, 1993.
Slatyer, R. O. and McIlroy, I. C.: Practical microclimatology, Commonwealth
Scientific and Industrial Research Organisation, Canberra, Australia, https://doi.org/10.1016/0002-1571(65)90036-1, 1961.
Swann, A. L., Hoffman, F. M., Koven, C. D., and Randerson, J. T.: Plant
responses to increasing CO2 reduce estimates of climate impacts on
drought severity, P. Natl. Acad. Sci. USA, 113, 10019–10024,
https://doi.org/10.1073/pnas.1604581113, 2016.
Thornthwaite, C. W.: An approach toward a rational classification of climate, Geogr. Rev., 38, 55–94, https://doi.org/10.2307/210739, 1948.
Twine, T. E., Kustas, W. P., Norman, J. M., Cook, D. R., Houser, P. R., Meyers, T. P., Prueger, J. H., Srarks, P. J., and Wesely, M. L.: Correcting eddy-covariance flux underestimates over a grassland, Agr. Forest Meteorol., 103, 279–300, https://doi.org/10.1016/S0168-1923(00)00123-4, 2000.
Vicente-Serrano, S. M., Gouveia, C., Camarero, J. J., Beguería, S.,
Trigo, R., López-Moreno, J. I., Azorín-Molina, C., Pasho, E., Lorenzo-Lacruz, J., Revuelto, J., Morán-Tejeda, E., and Sanchez-Lorenzo,
A.: Response of vegetation to drought time-scales across global land biomes,
P. Natl. Acad. Sci. USA, 110, 52–57, https://doi.org/10.1073/pnas.1207068110, 2013.
Wang, K. and Dickinson, R. E.: A review of global terrestrial evapotranspiration: Observation, modeling, climatology, and climatic variability, Rev. Geophys., 50, RG2005, https://doi.org/10.1029/2011RG000373, 2012.
Wilson, K., Goldstein, A., Falge, E., Aubinet, M., Baldocchi, D., Berbigier, P., Bernhofer, C., Ceulemans, R., Dolman, H., Field, C., Grelle, A., Ibrom, A., Law, B. E., Kowalski, A., Meyers, T., Moncrieff, J., Monson, R., Oechel, W., Tenhunen, J., Valentini, R., and Verma, S.: Energy balance closure at FLUXNET sites, Agr. Forest Meteorol., 113, 223–243, https://doi.org/10.1016/S0168-1923(02)00109-0, 2002.
Yang, Y. and Roderick, M. L.: Radiation, surface temperature and evaporation over wet surfaces, Q. J. Roy. Meteorol. Soc., 145, 1118–1129,
https://doi.org/10.1002/qj.3481, 2019.
Yang, Y., Roderick, M. L., Zhang, S., McVicar, T. R., and Donohue, R. J.:
Hydrologic implications of vegetation response to elevated CO2 in
climate projections, Nat. Clim. Change, 9, 44–48, https://doi.org/10.1038/s41558-018-0361-0, 2019.
Short summary
Here we test a maximum evaporation theory that acknowledges the interdependence between radiation, surface temperature, and evaporation over saturated land. We show that the maximum evaporation approach recovers observed evaporation and surface temperature under non-water-limited conditions across a broad range of bio-climates. The implication is that the maximum evaporation concept can be used to predict potential evaporation that has long been a major difficulty for the hydrological community.
Here we test a maximum evaporation theory that acknowledges the interdependence between...
