Variability in Large-Scale Water Balance with Land Surface-Atmosphere Interaction

Entekhabi, Dara; Rodrı́guez-Iturbe, Ignacio; Bras, Rafael L.

doi:10.1175/1520-0442(1992)005<0798:vilswb>2.0.co;2

Cited by 176 publications

(106 citation statements)

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“…The values for  at all other locations are all greater than one. Initially, this result is surprising because Pierce (1958) and Entekhabi et al (1992) suggest that, for vegetated locations,  is less than one and smaller than for bare soil. However, the apparent contradiction can be explained by the shallow depth considered here.…”

Section: Chapter 5 Model Analysismentioning

confidence: 97%

Effects of woody vegetation on shallow soil moisture at a semiarid montane catchment

Traff

2014

Ecohydrology

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Section: Chapter 5 Model Analysismentioning

confidence: 97%

Effects of woody vegetation on shallow soil moisture at a semiarid montane catchment

Traff

2014

Ecohydrology

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“…It is well known that drought or precipitation events may be amplified by persistent soil moisture anomalies (Enthekabi et al, 1992;Seneviratne et al, 2006;Fischer et al, 2007aFischer et al, , 2007b. Whether a certain state of the soil can persist over longer time-scales is controlled by the strength of the land-atmosphere coupling.…”

Section: Introductionmentioning

confidence: 99%

Diurnal equilibrium convection and land surface–atmosphere interactions in an idealized cloud‐resolving model

Schlemmer

Hohenegger

Schmidli

et al. 2012

Quart J Royal Meteoro Soc

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The influence of soil moisture and atmospheric stability on mid-latitude diurnal convection and land-atmosphere exchange is investigated in an idealized cloudresolving modelling framework using a full set of parametrization schemes. In each member of a series of month-long experiments, the model attains a state where deep, precipitating convection is triggered every day. This state is referred to as equilibrium diurnal convection. The triggering occurs via different mechanisms depending on the atmosphere-soil setting. In our framework latent heat fluxes comprise the primary control over the precipitation amounts. We find that evaporation is regulated by the availability of energy on the one hand and the availability of soil moisture and the near-surface saturation deficit of the atmosphere on the other. Increased cloud cover over wet soils reduces net short-wave radiation but increases net long-wave radiation, leading to a near-compensation of the two effects on available energy. Increased boundary layer moisture is removed by deep convection, thus increasing the near-surface saturation deficit and preventing a negative feedback of boundary layer moisture content on the latent heat fluxes. We also find that there is a spatial correlation between soil moisture and precipitation anomalies, suggesting that the soil moisture precipitation feedback acts on a scale of 10-50 km. Copyright c 2012 Royal Meteorological Society Key Words: convection; cloud-resolving modelling; land-surface atmosphere interactions

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“…Soil moisture strongly controls the magnitude of these fluxes [e.g., Yeh et al, 1984]. The soil moisture reservoir evolves on timescales as long as months or years, and therefore acts as a source of long-term "memory" [Entekhabi et al, 1992] that may influence the atmosphere in two different ways. First, it is hypothesized that a positive soil moisture-rainfall feedback exists within some areas--wet (dry) soil enhances (inhibits) precipitation in that We compared results from a "Control" simulation to observations to assess the performance of the model in simulating the NAMS.…”

Section: Introductionmentioning

confidence: 99%

The influence of soil moisture anomalies on variability of the North American Monsoon System

Small

2001

Geophysical Research Letters

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Abstract. We examine the influence of land-atmosphere interactions, as moderated by soil moisture anomalies, on variability of the North American Monsoon System (NAMS). Sensitivity experiments, in which soil moisture was prescribed to field capacity, were completed with the MM5 mesoscale model linked to the OSU land surface scheme. Our results demonstrate that the NAMS precipitation response to soil moisture forcing depends critically on the location of anomalous surface conditions. Wet soil in the southern Rocky Mountains (SRM) during July, which could result from the melt of an above-normal snowpack, inhibits precipitation in the NAMS region. This is consistent with the observed negative correlation between SRM spring snowcover and NAMS summer precipitation [Gutzler and Preston, 1997]. In contrast, wet soil in the NAMS region enhances July precipitation within that arearea positive soil moisturerainfall feedback exists. Our findings must be tested with experiments that incorporate anomalies constrained by regional-scale soil moisture observations.

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Variability in Large-Scale Water Balance with Land Surface-Atmosphere Interaction

Cited by 176 publications

References 0 publications

Effects of woody vegetation on shallow soil moisture at a semiarid montane catchment

Effects of woody vegetation on shallow soil moisture at a semiarid montane catchment

Diurnal equilibrium convection and land surface–atmosphere interactions in an idealized cloud‐resolving model

The influence of soil moisture anomalies on variability of the North American Monsoon System

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