Observed increase in local cooling effect of deforestation at higher latitudes

Xuhui Lee, Michael L. Goulden, David Y. Hollinger, Alan Barr, T. Andrew Black, Gil Bohrer, Rosvel Bracho, Bert Drake, Allen Goldstein, Lianhong Gu, Gabriel Katul, Thomas E Kolb, Beverly E. Law, Hank Margolis, Tilden Meyers, Russell Monson, William Munger, Ram Oren, Kyaw Tha Paw U, Andrew D. RichardsonHans Peter Schmid, Ralf Staebler, Steven Wofsy, Lei Zhao

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Abstract

Deforestation in mid-to high latitudes is hypothesized to have the potential to cool the Earth's surface by altering biophysical processes. In climate models of continental-scale land clearing, the cooling is triggered by increases in surface albedo and is reinforced by a land albedo-sea ice feedback. This feedback is crucial in the model predictions; without it other biophysical processes may overwhelm the albedo effect to generate warming instead. Ongoing land-use activities, such as land management for climate mitigation, are occurring at local scales (hectares) presumably too small to generate the feedback, and it is not known whether the intrinsic biophysical mechanism on its own can change the surface temperature in a consistent manner. Nor has the effect of deforestation on climate been demonstrated over large areas from direct observations. Here we show that surface air temperature is lower in open land than in nearby forested land. The effect is 0.85±0.44K (mean±one standard deviation) northwards of 45°N and 0.21±0.53K southwards. Below 35°N there is weak evidence that deforestation leads to warming. Results are based on comparisons of temperature at forested eddy covariance towers in the USA and Canada and, as a proxy for small areas of cleared land, nearby surface weather stations. Night-time temperature changes unrelated to changes in surface albedo are an important contributor to the overall cooling effect. The observed latitudinal dependence is consistent with theoretical expectation of changes in energy loss from convection and radiation across latitudes in both the daytime and night-time phase of the diurnal cycle, the latter of which remains uncertain in climate models.

Original languageEnglish (US)
Pages (from-to)384-387
Number of pages4
JournalNature
Volume479
Issue number7373
DOIs
StatePublished - Nov 17 2011

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Conservation of Natural Resources
Climate
Biophysical Phenomena
Temperature
Ice Cover
Convection
Weather
Proxy
Canada
Air
Radiation

ASJC Scopus subject areas

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Lee, X., Goulden, M. L., Hollinger, D. Y., Barr, A., Black, T. A., Bohrer, G., ... Zhao, L. (2011). Observed increase in local cooling effect of deforestation at higher latitudes. Nature, 479(7373), 384-387. https://doi.org/10.1038/nature10588

Observed increase in local cooling effect of deforestation at higher latitudes. / Lee, Xuhui; Goulden, Michael L.; Hollinger, David Y.; Barr, Alan; Black, T. Andrew; Bohrer, Gil; Bracho, Rosvel; Drake, Bert; Goldstein, Allen; Gu, Lianhong; Katul, Gabriel; Kolb, Thomas E; Law, Beverly E.; Margolis, Hank; Meyers, Tilden; Monson, Russell; Munger, William; Oren, Ram; Paw U, Kyaw Tha; Richardson, Andrew D.; Schmid, Hans Peter; Staebler, Ralf; Wofsy, Steven; Zhao, Lei.

In: Nature, Vol. 479, No. 7373, 17.11.2011, p. 384-387.

Research output: Contribution to journalArticle

Lee, X, Goulden, ML, Hollinger, DY, Barr, A, Black, TA, Bohrer, G, Bracho, R, Drake, B, Goldstein, A, Gu, L, Katul, G, Kolb, TE, Law, BE, Margolis, H, Meyers, T, Monson, R, Munger, W, Oren, R, Paw U, KT, Richardson, AD, Schmid, HP, Staebler, R, Wofsy, S & Zhao, L 2011, 'Observed increase in local cooling effect of deforestation at higher latitudes', Nature, vol. 479, no. 7373, pp. 384-387. https://doi.org/10.1038/nature10588
Lee X, Goulden ML, Hollinger DY, Barr A, Black TA, Bohrer G et al. Observed increase in local cooling effect of deforestation at higher latitudes. Nature. 2011 Nov 17;479(7373):384-387. https://doi.org/10.1038/nature10588
Lee, Xuhui ; Goulden, Michael L. ; Hollinger, David Y. ; Barr, Alan ; Black, T. Andrew ; Bohrer, Gil ; Bracho, Rosvel ; Drake, Bert ; Goldstein, Allen ; Gu, Lianhong ; Katul, Gabriel ; Kolb, Thomas E ; Law, Beverly E. ; Margolis, Hank ; Meyers, Tilden ; Monson, Russell ; Munger, William ; Oren, Ram ; Paw U, Kyaw Tha ; Richardson, Andrew D. ; Schmid, Hans Peter ; Staebler, Ralf ; Wofsy, Steven ; Zhao, Lei. / Observed increase in local cooling effect of deforestation at higher latitudes. In: Nature. 2011 ; Vol. 479, No. 7373. pp. 384-387.
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