The role of dew in the seasonal moisture balance of a summer-dry climate

Tuller, Stanton E.; Chilton, Rodney

doi:10.1016/0002-1571(73)90057-5

Cited by 35 publications

(34 citation statements)

References 9 publications

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“…Thus, photosynthesis as a result of high relative humidity may be especially important in the relatively sun-sheltered north-facing slope. Indirect shading by the perennial vegetation at the north-facing slope may have an additional advantage in prolonging dew and fog durations (Duvdevani et al, 1946;Tuller & Chilton, 1973).…”

Section: Dew and Fog Precipitation And Estimation Of The Effective Dementioning

confidence: 99%

The role of dew as a moisture source for sand microbiotic crusts in the Negev Desert, Israel

Kidron

Herrnstadt

Barzilay

2002

Journal of Arid Environments

179

146

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Section: Dew and Fog Precipitation And Estimation Of The Effective Dementioning

confidence: 99%

The role of dew as a moisture source for sand microbiotic crusts in the Negev Desert, Israel

Kidron

Herrnstadt

Barzilay

2002

Journal of Arid Environments

179

146

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“…Assuming that the net radiation balance (Rn -G) falls to about -100 W m-2 on a clear night, Equation 3.16 predicts a maximum rate of dewfall of approximately 0.1 mm h-1 for saturated air Oones, 1983). Typical rates of dewfall that have been measured are commonly only 0.1-0.2 mm night-1 (Tuller and Chilton, 1973), with maximum rates up to about 0.4 mm night-1 (Monteith, 1963;Burrage, 1972). These field values thus are well below theoretical limits.…”

Section: (F) Dewfallmentioning

confidence: 93%

Water in the environment

Rundel¹,

Jarrell²

1989

Plant Physiological Ecology

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“…In addition, some studies show that dew can contribute to the stabilisation of sand dunes [5,6]. Dew can also improve the internal water balance of plants [7][8][9][10], prolong the survival of tree seedlings [11,12], and delay the wilting of leaves [11].…”

Section: Introductionmentioning

confidence: 99%

Agreement of Four Equations for Computing Dewfall in Northern Germany

Xiao

Meißner

Borg

et al. 2017

Water

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Abstract:The energy balance (EB), turbulent vapour transport (TVT), Penman-Monteith (PM) and Bowen ratio energy balance (BREB) equation were used to estimate dewfall based on meteorological data. Initially there were big disagreements between the estimates from these four equations. However, after multiplying the heat and vapour conductance terms by 0.33 the agreement was much better. This implies that the disagreements derived from improper conductance values. Initially we did not consider the effect of atmospheric stability on the conductances. With stability correction the conductances were on average 0.5 times the values without stability correction. To arrive at the aforementioned 0.33, the conductances with stability correction still need to be lower by a factor of 0.66. The value of the von Karman constant and the relationships for the zero plane displacement and the roughness length we used in our conductance computations are widely used, but not the only possible ones. With different values and relationships also suggested in the literature one can reach this factor. However, it is also possible that our wind speed data contributed to the fact that the conductances we computed were too high. Their computation for a given canopy-atmosphere system requires wind speeds from a wind profile in equilibrium with the vegetation. This in turn requires an adequate fetch around the investigated surface. The highly varied vegetation in and around the site where the study was conducted makes adequate fetch rather doubtful. To obtain valid conductance values the atmospheric stability conditions must be considered, the appropriate values for the von Karman constant, the zero plane displacement and roughness length must be used, and there must be adequate fetch. The BREB equation does not contain a conductance term and therefore does not suffer from the problems just stated. The other three equations do. However, the BREB, like the EB and TVT equations, need the surface temperature which is not routinely measured. This then leaves the PM equation from which this temperature has been eliminated as the only option. Hence, in a future study dewfall estimates from the PM equation should be compared with direct measurements with a high precision weighing lysimeter.

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The role of dew in the seasonal moisture balance of a summer-dry climate

Cited by 35 publications

References 9 publications

The role of dew as a moisture source for sand microbiotic crusts in the Negev Desert, Israel

The role of dew as a moisture source for sand microbiotic crusts in the Negev Desert, Israel

Water in the environment

Agreement of Four Equations for Computing Dewfall in Northern Germany

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