Abstract
On the basis of information from the project “Land-surface Processes and their Experimental Study on the Chinese Loess Plateau”, we analyzed differences in land-surface water and heat processes during the main dry and wet periods of the semiarid grassland growing season in Yuzhong County, as well as the influences of these environmental factors. Studies have shown that there are significant differences in changes of land-surface temperature and humidity during dry and wet periods. Daily average normalized temperature has an overall vertical distribution of “forward tilting” and “backward tilting” during dry and wet periods, respectively. During the dry period, shallow soil above 20-cm depth is the active temperature layer. The heat transfer rate in soil is obviously different during dry and wet periods. During the dry period, the ratio of sensible heat flux to net radiation (H/Rn) and the value of latent heat flux to net radiation (LE/Rn) have a linear relationship with 5-cm soil temperature; during the wet period, these have a nonlinear relationship with 5-cm soil temperature, and soil temperature of 16°C is the critical temperature for changes in the land-surface water and heat exchange trend on a daily scale. During the dry period, H/Rn and LE/Rn have a linear relationship with soil water content. During the wet period, these have a nonlinear relationship with 5-cm soil water content, and 0.21 m3 m−3 is the critical point for changes in the land-surface water and heat exchange trend at daily scale. During the dry period, for vapor pressure deficit less than 0.7 kPa, H/Rn rises with increased vapor pressure deficit, whereas LE/Rn decreases with that increase. When that deficit is greater than 0.7 kPa, both H/Rn and LE/Rn tend to be constant. During the wet period, H/Rn increases with the vapor pressure deficit, whereas LE/Rn decreases. The above characteristics directly reflect the effect of differences in land-surface environmental factors during land-surface water and heat exchange processes, and indirectly reflect the influences of cloud precipitation processes on those processes.
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References
Falge E, Baldocchi D, Olson R, et al. 2001. Cap filling strategies for defensible annual sums of net ecosystem exchange. Agric For Meteorol, 107: 43–69
Fu C B, Ma Z G. 2008. Golbal change and regional acidification (in Chinese). Chin J Atmos Sci, 32: 752–760
Gao Z, Fan X, Bian L. 2003. An analytical solution to one-dimensional thermal conduction-convection in soil. Soil Sci, 168: 99–107
Gettelman A, Kinnsion D E, Dunkerton T J, et al. 2004. Impact of monsoon circulations on the upper troposphere and lower stratosphere. J Geohpys Res, 109: D22101,doi: 10.1029/2004JD004878
Guo J X, Yang X R, Li Q, et al. 2006. Diurnal variation of water and heat flux under transient water stress in a winter wheat field (in Chinese). Acta Ecolog Sin, 26: 130–137
Heusinkveld B G, Jscobs A F G, Hohslag A A M, et al. 2004. Surface energy balance closure in an arid region: Role of soil heat flux. Agric For Meteorol, 122: 21–37
Hu Y Q, Gao Y X, Wang J M, et al. 1994. Some Achievements in scientific research during HEIFE (in Chinese). Plateau Meteorol, 13: 225–236
Huang J, Guan X, Ji F. 2012. Enhanced cold-season warming in semi-arid regions. Atmos Chem Phys, 12: 5391–5398
Huang J P, Zhang W, Zuo J Q, et al. 2008. An overview of the semi-arid climate and environment research observatory over the Loess Plateau. Adv Atmos Sci, 25: 906–921
Huenneke L F, Anderson J P, Remmenga M. 2002. Desertification alters patterns of aboveground net primary production in Chihuahuan ecosystems. Glob Change Biol, 8: 247–264
Horton R, Wierenga P J. 1983. Estimating the soil heat flux from observations of soil temperature near the surface. Soil Sci Soc Am J, 47: 14–20
Lauwaet D, van Lipzig N P M, De Ridder K. 2009. The effect of vegetation changes on precipitation and mesoscale convective systems in the Sahel. Clim Dyn, 33: 521–534
Li H Y, Zhang Q, Wang C L, et al. 2012. The influences of air heat storage, plant photosynthesis and soil water movement on surface energy balance over the loess plateau (in Chinese). Acta Phys Sin, 61: 159201–159211
Liebetha C, Huwe B, Focken T. 2005. Sensitivity analysis for two ground heat flux calculation approaches. Agric For Meteorol, 132: 253–263
Liu H Z, Tu G, Dong W J. 2008. Three-year changes of surface albedo of degraded grassland and cropland surfaces in a semiarid area. Chin Sci Bull, 53: 1246–1254
Lü D R, Chen Z Z, Chen J Y, et al. 2002a. Composite study on Inner Mongolia semi-arid grassland and soil-vegetation-atmosphere interaction (IMGRASS) (in Chinese). Earth Sci Front, 9: 295–306
Lü D R, Chen Z Z, Wang G C, et al. 2002b. Climate-ecology interaction in Inner Mongolia semi-arid grassland preliminary results of IMGRASS project (in Chinese). Earth Sci Front, 9: 307–320
Mauder M, Foken T. 2006. Impact of post-field data processing on eddy covariance flux estimates and energy balance closure. Meteor Z, 15: 597–609
Oncley S P, Foken T, Vogt R, et al. 2007. The energy balance experiment EBEX-2000. Part I: Overview and energy balance. Bound-Layer Meteor, 123: 1–28
Wang G, Huang J, Guo W, et al. 2010. Observation analysis of land- atmosphere interaction over Loess Plateau of Northwestern China. J Geophys Res, 115: D00K17,doi: 10.1029/2009JD013372
Wang K C, Wang P C, Liu J M, et al. 2005. Variation of surface albedo and soil thermal parameters with soil moisture content at a semi-desert site on the western Tibetan Plateau. Bound-Layer Meteor, 116: 117–129
Wei Z G, Wen J, Lü S H, et al. 2005. A primary field experiment of land-atmosphere interaction over the Loess Plateau and its ground surface energy in clear day (in Chinese). Plateau Meteorol, 24: 545–555
Wen J, Wei Z G, Lü S H, et al. 2007. The characteristics of land surface energy and water exchange over the Loess Plateau Mesa in China. Adv Atmos Sci, 24: 301–310
Wilson K, Goldstein A, Falge E, et al. 2002. Energy balance closure at flux net sites. Agric For Meteorol, 113: 223–243
Xu X D, Chen L S. 2006. Advances of the study on Tibetan Plateau experiment of atmospheric sciences (in Chinese). J Appl Meteorol Sci, 17: 756–772
Xu Z W, Liu S M, Xu T R, et al. 2009. Comparison of the gap filling methods of evapotranspiration measured by eddy covariance system (in Chinese). Adv Earth Sci, 24: 372–382
Yang K, Wang J M. 2008. A temperature prediction-correction method for estimating surface soil heat flux from soil temperature and moisture data. Sci China Ser D-Earth Sci, 51: 721–729
Yue P, Zhang Q, Niu S J, et al. 2011. Effects of heat soil flux estimates on surface energy balance closure over a semi-arid grassland. Acta Meteor Sin, 25: 774–782
Yue P, Li Y H, Zhang Q, et al. 2012. Surface energy-balance closure in a gully region of the Loess Plateau at SACOL on eastern edge of Tibetan Plateau. J Meteorol Soc Jap, 90C: 173–184
Yue Ping, Zhang Qiang, Wang Sheng et al. 2013a. Characteristics of soil temperature, moisture and heat pro- and post precipitation in semiarid grassland over Longzhong Loess Plateau (in Chinese). J Desert Res, 33: 1766–1774
Yue P, Zhang Q, Zhao W, et al. 2013b. Effects of clouds and precipitation disturbance on the surface radiation budget and energy balance over loess plateau semi-arid grassland in China (in Chinese). Acta Phys Sin, 62: 209201–209214
Zhang Q, Wei G A, Cao X Y, et al. 2002. Observation and study of land surface parameters over Gobi in typical arid region. Adv Atmos Sci, 19: 121–135
Zhang Q, Wang S. 2008. On land surface processes and its experimental study in Chinese Loess Plateau (in Chinese). Adv Earth Sci, 23: 167–173
Zhang Q, Sun Z X, Wang S. 2011. Analysis of variation regularity of land-surface physical quantities over Dingxi Regions of the Loess Plateau (in Chinese). Chin J Geophys, 54: 1727–1737
Zhang Q, Zeng J, Zhang L Y. 2012a. Characteristics of land surface thermal- hydrologic processes for different regions over North China during prevailing summer monsoon period. Sci China Earth Sci, 55: 1872–1880,doi: 10.1007/s11430-012-4373-8
Zhang Q, Li H Y, Zhao J H. 2012b. Modification of the land surface energy balance relationship by introducing vertical sensible heat advection and soil heat storage over the Loess Plateau. Sci China Earth Sci, 55: 580–589,doi: 10.1007/s11430-011-4220-3
Zhang Q, Zhang L, Huang J, et al. 2014. Spatial distribution of surface energy fluxes over the Loess Plateau in China and its relationship with climate and the environment. Sci China Earth Sci, 57: 2135–2147, doi: 10.1007/s11430-014-4881-9
Zhang R H, Koike T, Xu X D, et al. 2012. A China-Japan cooperative JICA atmospheric observing network over the Tibetan Plateau (JICA/ Tibet Project): An overviews. J Meteorol Soc Jap, 90C: 1–16
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Yue, P., Zhang, Q., Zhao, W. et al. Influence of environmental factors on land-surface water and heat exchange during dry and wet periods in the growing season of semiarid grassland on the Loess Plateau. Sci. China Earth Sci. 58, 2002–2014 (2015). https://doi.org/10.1007/s11430-015-5133-3
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DOI: https://doi.org/10.1007/s11430-015-5133-3