A regional perspective on trends in continental evaporation

Teuling, Adriaan J.; Hirschi, Martin; Ohmura, Atsumu; Wild, Martin; Reichstein, Markus; Ciais, Philippe; Buchmann, Nina; Ammann, Christof; Montagnani, Leonardo; Richardson, A. D.; Wohlfahrt, Georg; Seneviratne, Sonia I.

doi:10.1029/2008gl036584

Cited by 308 publications

(341 citation statements)

References 22 publications

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“…Studies referring to one of the measures [e.g., Dai et al, 1997] show that correlations between DTR and precipitation are as high as 0.55, whereas the correlation between DTR and total cloud cover is only 0.35. Teuling et al [2009] show a close correlation between SSR and evaporation in the northerly part of Europe whereas in southern Europe SSR and precipitation are more closely correlated. This indicates that moisture availability is not a limiting factor for evaporation in central and northern Europe and therefore should have a minor influence on DTR in those areas.…”

Section: Introductionmentioning

confidence: 97%

On the relationship between diurnal temperature range and surface solar radiation in Europe

et al. 2009

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[1] The surface solar radiation (SSR) is an important factor influencing the local and global energy budget. However, information on the spatial and temporal variation of SSR is limited. A more commonly available measure, which may provide such information, is the diurnal temperature range (DTR). In this study we analyze the relationship between DTR and SSR in Europe between 1970 and 2005 on seasonal and decadal scale. When comparing the mean anomalies time series composed of 31 pairs of sites with long-term SSR and DTR measurements, we found a correlation coefficient of 0.87 in the annual mean and between 0.61 and 0.92 in the seasonal mean anomalies. When investigating the individual pairs of SSR and DTR individually, we found that local correlations are mostly lower than the European mean and that they decrease rapidly in seasons and latitudes with low incident angles and at high alpine altitude. The highest correlation on local and seasonal scales seems to be connected with the variability of the large-scale circulation in Europe. The output of 11 simulations of current generation regional climate models over Europe confirms the strong relationship between SSR and DTR. The seasonal dependence of the relationship is well reproduced, but the absolute values of DTR and SSR are mostly too low. The pattern of decrease (dimming) and increase (brightening) in SSR and DTR was not reproduced in the modeled time series. There is still strong evidence from both models and observations that DTR is a reliable representative of SSR.Citation: Makowski, K., E. B. Jaeger, M. Chiacchio, M. Wild, T. Ewen, and A. Ohmura (2009), On the relationship between diurnal temperature range and surface solar radiation in Europe,

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Section: Introductionmentioning

confidence: 97%

On the relationship between diurnal temperature range and surface solar radiation in Europe

et al. 2009

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“…In addition, the line is nearly vertical. This indicates that despite the large influences that dimming has on pan evaporation, the actual evapotranspiration trend in this region is barely sensitive to it [see Teuling et al, 2009].…”

Section: Combined Impact Of Climate Forcingsmentioning

confidence: 99%

“…A comparison of actual evapotranspiration between arid and humid places hints at the existence of a water-limited regime. In arid places, namely, actual evapotranspiration is barely sensitive to the incoming short wave radiation [Teuling et al, 2009], but responds strongly to an increase in soil moisture. This is not the case for pan evaporation.…”

Section: Separate Impact Of Climate Forcingsmentioning

confidence: 99%

“…In humid climates, where evaporation is limited by the available energy rather than by the water supply at the land surface, this explanation is considered to be the main cause of decreasing trends in both pan evaporation and actual evapotranspiration [Teuling et al, 2009].…”

Section: Introductionmentioning

confidence: 99%

“…It is, however, only partially understood how pan evaporation is related to the actual evapotranspiration from its surroundings. Only few long term data sets are available for this variable [Teuling et al, 2009;Seneviratne et al, 2010]. Therefore, interpreting trends in pan evaporation is key to inferring past and future changes in the terrestrial water cycle.…”

Section: Introductionmentioning

confidence: 99%

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Land‐atmosphere coupling explains the link between pan evaporation and actual evapotranspiration trends in a changing climate

Heerwaarden

Arellano

Teuling

2010

Geophysical Research Letters

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[1] Decreasing trends in pan evaporation are widely observed across the world as a response of the climate system to changes in temperature, precipitation, incoming radiation and wind speed. Nevertheless, we only partially understand how trends in actual evapotranspiration are linked to those trends. Here, we use a model to show that regulation of the near-surface temperature and humidity by land-atmosphere feedbacks results in a strong connection between pan evaporation, actual evapotranspiration and vapor pressure deficit (VPD) depending on the climate forcings. When climate change occurs, the feedbacks direct the system towards a different combination of the three variables. If we know the trends in pan evaporation, VPD and wind speed, we can therefore infer the change in the forcings and estimate the trend in actual evapotranspiration.Citation: van Heerwaarden, C. C., J. Vilà-Guerau de Arellano, and A. J. Teuling (2010), Land-atmosphere coupling explains the link between pan evaporation and actual evapotranspiration trends in a changing climate, Geophys.

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Systematic land climate and evapotranspiration biases in CMIP5 simulations

Mueller

Seneviratne

2014

Geophysical Research Letters

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238

168

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[1] Land climate is important for human population since it affects inhabited areas. Here we evaluate the realism of simulated evapotranspiration (ET), precipitation, and temperature in the CMIP5 multimodel ensemble on continental areas. For ET, a newly compiled synthesis data set prepared within the Global Energy and Water Cycle Experiment-sponsored LandFlux-EVAL project is used. The results reveal systematic ET biases in the Coupled Model Intercomparison Project Phase 5 (CMIP5) simulations, with an overestimation in most regions, especially in Europe, Africa, China, Australia, Western North America, and part of the Amazon region. The global average overestimation amounts to 0.17 mm/d. This bias is more pronounced than in the previous CMIP3 ensemble (overestimation of 0.09 mm/d). Consistent with the ET overestimation, precipitation is also overestimated relative to existing reference data sets. We suggest that the identified biases in ET can explain respective systematic biases in temperature in many of the considered regions. The biases additionally display a seasonal dependence and are generally of opposite sign (ET underestimation and temperature overestimation) in boreal summer (June–August).

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A regional perspective on trends in continental evaporation

Cited by 308 publications

References 22 publications

On the relationship between diurnal temperature range and surface solar radiation in Europe

On the relationship between diurnal temperature range and surface solar radiation in Europe

Land‐atmosphere coupling explains the link between pan evaporation and actual evapotranspiration trends in a changing climate

Systematic land climate and evapotranspiration biases in CMIP5 simulations

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