Estimation of soil heat flux from net radiation during the growth of alfalfa

Clothier, Brent; Clawson, K. L.; Pinter, P. J.; Moran, M. Susan; Reginato, R. J.; Jackson, R. D.

doi:10.1016/0168-1923(86)90069-9

Cited by 196 publications

(90 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These assumptions can be inaccurate for various reasons, e.g., changes of daytime radiation can be stored and released to change nighttime temperature. Observations from global flux networks show that storage fraction is less than 10% of R s at most surfaces (42,43). Allowing for this effect would likely amplify our estimate of the impact of R s on T a over global land by a factor of ∼1.1.…”

Section: Significancementioning

confidence: 98%

Contribution of solar radiation to decadal temperature variability over land

Wang

Dickinson

2013

Proc. Natl. Acad. Sci. U.S.A.

131

117

View full text Add to dashboard Cite

Global air temperature has become the primary metric for judging global climate change. The variability of global temperature on a decadal timescale is still poorly understood. This paper examines further one suggested hypothesis, that variations in solar radiation reaching the surface (R s ) have caused much of the observed decadal temperature variability. Because R s only heats air during the day, its variability is plausibly related to the variability of diurnal temperature range (daily maximum temperature minus its minimum). We show that the variability of diurnal temperature range is consistent with the variability of R s at timescales from monthly to decadal. This paper uses long comprehensive datasets for diurnal temperature range to establish what has been the contribution of R s to decadal temperature variability. It shows that R s over land globally peaked in the 1930s, substantially decreased from the 1940s to the 1970s, and changed little after that. Reduction of R s caused a reduction of more than 0.2°C in mean temperature during May to October from the 1940s through the 1970s, and a reduction of nearly 0.2°C in mean air temperature during November to April from the 1960s through the 1970s. This cooling accounts in part for the near-constant temperature from the 1930s into the 1970s. Since then, neither the rapid increase in temperature from the 1970s through the 1990s nor the slowdown of warming in the early twenty-first century appear to be significantly related to changes of R s .global dimming | global brightening | global warming | surface incident solar radiation | decadal variability G lobal temperature has become the primary metric for judging global climate change, although many other factors are recognized to be of comparable importance. The overall increase of global temperature over the last century has been largely attributed to the increase of greenhouse gases (1). Less well understood are the reasons for the variability of this increase on a decadal timescale. In particular, warming from 1900 to 1940 was followed by three decades of flat or slightly decreasing temperature, then three decades of very rapid temperature increase, then so far in this century, very little additional increase. The two most plausible explanations for the decadal variability are natural climate variability and variable degrees of cooling from anthropogenic releases of sulfur gas producing sulfate aerosols (2). This effect has long been proposed as a mechanism to counter greenhouse warming (3), has become the basis for many geoengineering proposals (4), and has been used to attribute the lack of warming so far this century to the rapid growth of aerosols in Asia (5).Besides the difference in sign of their temperature effects, sulfate aerosols are distinguished from greenhouse gases in that they only affect daytime radiation, i.e., surface incident solar radiation (R s ). Some kinds of natural variability can also act through affecting R s , i.e., those involving cloud properties.Changes of aerosol loading and ...

show abstract

Section: Significancementioning

confidence: 98%

Contribution of solar radiation to decadal temperature variability over land

Wang

Dickinson

2013

Proc. Natl. Acad. Sci. U.S.A.

131

117

View full text Add to dashboard Cite

show abstract

“…Many investigations have shown that the mid-day G 0 =R n fraction is reasonably predicted from special vegetation indices . Some researchers have shown that G 0 =R n ¼ À(NDVI) (Clothier et al, 1986;Choudhury et al, 1987;Kustas and Daughtry, 1990). An improved fraction of G 0 =R n ¼ À(r 0 , T sfc , NDVI) was proposed (Menenti et al, 1991;.…”

Section: Soil Heat Fluxmentioning

confidence: 99%

Diurnal and inter-monthly variation of land surface heat fluxes over the central Tibetan Plateau area

Fan

Ishikawa

et al. 2004

Theor. Appl. Climatol.

View full text Add to dashboard Cite

The energy and water cycle over the Tibetan Plateau play an important role in the Asian monsoon system, which in turn is a major component of both the energy and water cycles of the global climate system. Using field observational data observed from the GAME=Tibet (GEWEX (Global Energy and Water cycle Experiment) Asian Monsoon Experiment on the Tibetan Plateau) and the CAMP=Tibet (CEOP (Coordinated Enhanced Observing Period) Asia-Australia Monsoon Project (CAMP) on the Tibetan Plateau), some results on the local surface energy partitioning (diurnal variation, inter-monthly variation and vertical variation etc.) are presented in this study.The study on the regional surface energy partitioning is of paramount importance over heterogeneous landscape of the Tibetan Plateau and it is also one of the main scientific objectives of the GAME=Tibet and the CAMP=Tibet. Therefore, the regional distributions and their inter-monthly variations of surface heat fluxes (net radiation flux, soil heat flux, sensible heat flux and latent heat flux) are also derived by combining NOAA-14=AVHRR data with field observations. The derived results were validated by using the ''ground truth'', and it shows that the derived regional distributions and their inter-monthly variations of land surface heat fluxes are reasonable by using the method proposed in this study.Further improvement of the method and its applying field were also discussed.

show abstract

“…Many investigations have shown that the mid-day G 0 /R n fraction is reasonably predicted from special vegetation indices . Some researchers have shown that G 0 /R n ¼ GðNDVIÞ (Clothier et al 1986;Choudhury et al 1987;Kustas and Daughtry 1990). An improved fraction of G 0 /R n ¼ Gðr 0 ; T sfc ; NDVIÞ was proposed (Menenti et al 1991;Bastiaanssen 1995).…”

Section: B Soil Heat Fluxmentioning

confidence: 99%

Regionalization of Surface Fluxes over Heterogeneous Landscape of the Tibetan Plateau by Using Satellite Remote Sensing Data

Ishikawa

Tsukamoto

et al. 2003

Journal of the Meteorological Society of Japan

View full text Add to dashboard Cite

In this study, a parameterization method based on NOAA-14/AVHRR data and field observations is described and tested for deriving the regional land surface variables, vegetation variables and land surface heat fluxes over a heterogeneous landscape. As a case study, the method was applied to the Tibetan Plateau area. The regional distribution maps of surface reflectance, MSAVI, vegetation coverage, surface temperature, net radiation, soil heat flux, sensible heat flux and latent heat flux were determined over the Tibetan Plateau area. The derived results were validated by using the ''ground truth''. The results show that the more reasonable regional distributions and their seasonal variations of land surface variables (surface reflectance, surface temperature), vegetation variables (MSAVI and vegetation coverage), net radiation, soil heat flux and sensible heat flux can be obtained by using the method proposed in this study. However, the approach of deriving regional latent heat flux, and their seasonal variation as the residual of the energy budget, may not be a good method due to the unbalance of energy and the strong advection over the study area. Further improvement of the method was also discussed.

show abstract

Estimation of soil heat flux from net radiation during the growth of alfalfa

Cited by 196 publications

References 10 publications

Contribution of solar radiation to decadal temperature variability over land

Contribution of solar radiation to decadal temperature variability over land

Diurnal and inter-monthly variation of land surface heat fluxes over the central Tibetan Plateau area

Regionalization of Surface Fluxes over Heterogeneous Landscape of the Tibetan Plateau by Using Satellite Remote Sensing Data

Contact Info

Product

Resources

About