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water and heat fluxes
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  水热通量
     Model comparisons for estimating water and heat fluxes of reed wetland ecosystem in Panjin were done among Profile gradient method,Bowen ratio energy balance method(BREB) and Eddy covariance method(EC),based on the data from July 1 to July 31,2005 by open-path eddy covariance system(Li-7500,Li-cor Inc,USA) and the micro-climate gradient observation system.
     利用2005年7月盘锦芦苇湿地生长旺季的小气候梯度系统30 min观测资料和开放式涡动相关系统10Hz原始观测资料,比较并分析了廓线法、波文比能量平衡法与涡动相关法计算的芦苇湿地生态系统水热通量
短句来源
     Diurnal variation of winter wheat water and heat fluxes of a simulation with photosynthesis-evapotranspiration coupled model.
     用光合-蒸散耦合模型模拟冬小麦水热通量的日变化
短句来源
     After rain,the value of water and heat fluxes in reed wetland ecosystem increased and the peak value appeared ahead of time.
     降雨之后,芦苇湿地生态系统水热通量都有所增加,尤其是潜热通量增加显著,且峰值出现时间提前。
短句来源
     Model comparisons of estimating water and heat fluxes of reed wetland ecosystem in Panjin were done among Profile gradient method, Bowen ratio energy balance method and Eddy covariance method, based on the data from July 1 to July 31, 2005 by open-path eddy covariance system (Li-7500, Li-cor Inc, USA) and the micro-climate gradient observation system.
     利用2005年7月盘锦芦苇湿地芦苇生长旺季的小气候梯度系统半小时观测资料和开放式涡动相关系统10Hz原始观测资料,比较分析了廓线法、波文比能量平衡法与涡动相关法计算的芦苇湿地生态系统水热通量
     Model comparisons for estimating water and heat fluxes of reed wetland ecosystem in Panjin
     盘锦芦苇湿地水热通量计算方法的比较研究
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  “water and heat fluxes”译为未确定词的双语例句
     Estimation and Analysis of Land Surface Water and Heat Fluxes in Mountain-plain Area Based on Remote Sensing and DEM
     基于遥感和DEM的山区—平原地表水热通量估算及对比分析研究
短句来源
     A review on research of land surface water and heat fluxes.
     地表水热通量研究进展
短句来源
     Comparison Study on Carbon Dioxide, Water and Heat Fluxes of the Forest Ecosystem in Red Earth Hilly Zone over Winter and Spring
     红壤丘陵区人工林冬春时段碳、水、热通量的观测与分析
短句来源
     In order to study mesoscale water and heat fluxes induced by heterogeneous landscape in GCMs grid scale, the Pielke model has been coupled with a combined land surface processes model which includes a simplified canopy model and a simplified desert soil model.
     为了研究大气环流模式次网格中尺度通量的参数化问题,本文发展了一个Pielke中尺度边界层与陆面过程的耦合模式,陆面过程模式中包括一个简单植被水热传输模式及一个裸土沙漠模式。
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  相似匹配句对
     and water;
     水分:31。
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     in water was for P.R.
     R.
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     in water.
     对于水,它约为4 ×10~3大气压.
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     Water and Culture
     水与文化
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     Water Heater
     热水器
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  water and heat fluxes
Thereafter, water and heat fluxes in the other treatments were simulated using the same parameter values but with different crop-related measurements as driving variables for each treatment.
      


In order to study mesoscale water and heat fluxes induced by heterogeneous landscape in GCMs grid scale, the Pielke model has been coupled with a combined land surface processes model which includes a simplified canopy model and a simplified desert soil model. With this copuled model numerical simulations have been carried out on the typical heterogeneous land surface: oasis and desert which is distributed in the HEIFE experiment area. The results indicate that: (1) The mesoscale fluxes of water...

In order to study mesoscale water and heat fluxes induced by heterogeneous landscape in GCMs grid scale, the Pielke model has been coupled with a combined land surface processes model which includes a simplified canopy model and a simplified desert soil model. With this copuled model numerical simulations have been carried out on the typical heterogeneous land surface: oasis and desert which is distributed in the HEIFE experiment area. The results indicate that: (1) The mesoscale fluxes of water and heat are comparable to turbulence fluxes. Therefore,it is necessary to parameterize the mesoscale fluxes in large scale numerical model. (2) There is an optimal patch scale and patch number formesocale fluxes,i.e.,when oasis scale is 60 km and patch number is 3 patches, the mesoscale fluxes are the biggest. The mesoscale fluxes can be neglected when the patch number becomes large. (3) The increase of background wind speed decreases the mesoscale fluxes decrease; The roughness experiments indicate that the decrease of thermal difference between oasis and desert makes the mesoscale fluxes decrease.

为了研究大气环流模式次网格中尺度通量的参数化问题,本文发展了一个Pielke中尺度边界层与陆面过程的耦合模式,陆面过程模式中包括一个简单植被水热传输模式及一个裸土沙漠模式。利用这一耦合模式,对黑河试验区中沙漠和绿洲这种典型的非均匀下垫面进行了模拟,20多个数值试验的模拟结果表明:(1)中尺度通量在特定的情况下具有和湍流通量相当的重要性,因此,大尺度模式中对中尺度通量的参数化是十分必要的。(2)对于中尺度通量的发展存在一个明显的最优尺度和最优块数,即当绿洲尺度为60km,3块时,中尺度通量最大。而且当块数增加到一定数目时,可以忽略非均匀效应。(3)背景风速的增大可以使中尺度通量减小;粗糙度的试验说明非均匀块之间的热力差异的减小可使中尺度通量非线性地减小

Many field experiments were done, and soil vegetation atmosphere transfer(SVAT) models were stablished to estimate land surface heat fluxes. In this paper, the processes of experimental research on land surface water and heat fluxes are reviewed, and three kinds of SVAT model(single layer model, two layer model and multi layer model) are analyzed. Remote sensing data are widely used to estimate land surface heat fluxes.Based on remote sensing and energy balance equation, different models...

Many field experiments were done, and soil vegetation atmosphere transfer(SVAT) models were stablished to estimate land surface heat fluxes. In this paper, the processes of experimental research on land surface water and heat fluxes are reviewed, and three kinds of SVAT model(single layer model, two layer model and multi layer model) are analyzed. Remote sensing data are widely used to estimate land surface heat fluxes.Based on remote sensing and energy balance equation, different models such as simplified model, single layer model, extra resistance model, crop water stress index model and two source resistance model are developed to estimate land surface heat fluxes and evapotranspiration. These models are also analyzed in this paper.

介绍了当前国内外地表水热通量观测研究的进展及 3种不同类型的土壤 植被 大气传输模型(SVAT) :单层模型、双层模型和多层模型 .遥感手段常用于监测大面积地表水热通量 .基于地表能量平衡方程 ,现已建立了许多遥感模型以估算水热通量 (如简化模型、单层模型、附加阻抗模型、作物缺水指数模型和二源阻抗模型等 ) ,并对这些模型复杂程度及应用范围进行了分析

The covariance measurements of carbon dioxide, water and heat fluxes was carried out in Qian yanzhou station, CAS, at the different heights of 23m and 39m, respectively. Therefore, one set of data in one year for carbon dioxide, water and heat fluxes was obtained and the results at 23m and at 39m within winter and spring period were reported. The results showed that diurnal variation of carbon dioxide, water and heat fluxes at 23m and at 39m in winter and in spring had a similar changing tendency....

The covariance measurements of carbon dioxide, water and heat fluxes was carried out in Qian yanzhou station, CAS, at the different heights of 23m and 39m, respectively. Therefore, one set of data in one year for carbon dioxide, water and heat fluxes was obtained and the results at 23m and at 39m within winter and spring period were reported. The results showed that diurnal variation of carbon dioxide, water and heat fluxes at 23m and at 39m in winter and in spring had a similar changing tendency. During daytime, the ecosystem absorbed heat and H_2O vapor, but emitted CO_2 in this area. However, it was adversely during nighttime. The ranges of carbon dioxide, water and heat fluxes in winter and in spring were -1.5mg/(m~2s)~0.5mg/(m~2s), -0.02g/(m~2s)~0.08g/(m~2s), -50w/m~2~250w/m~2 and -2.0mg/(m~2s)~1.0mg/(m~2s), -0.025g/(m~2s)~0.20g/(m~2s), -50w/m~2~300w/m~2, respectively. The whole day and nighttime CO_2 fluxes at two heights in spring were all significant higher than those of winter, which indicated that in spring the photosynthesis and respiration of the vegetation in this area were intensive. In addition, it was not only in winter but also in spring, the daily flux and nighttime flux at 23m were larger than those of 39m, which indicated that there were advection and divergence fluxes between the two heights due to the heterogeneous and hilly topography in this area, therefore the measurement results at 23m were more closer to the exactly field exchange value. The vegetation was still processing photosynthesis in winter in this area. Furthermore the quantity of assimilated carbon dioxide through photosynthesis exceeded the emission through respiration, so the ecosystem in this area appeared a carbon sink even in winter. At the same time a correlation of the measurement results at two different heights in two seasons were provided, the measurement results at two heights had less difference in winter than in spring due to the less advection flow in winter.

用涡度相关法对亚热带红壤丘陵区人工针叶林的二氧化碳、水、热通量进行了观测,重点分析了23m、39m两层高度的观测结果,同时把观测期分为春季和冬季两个不同时间段作了对比。结果表明,不管冬季还是春季,39m高度所测的总通量值和夜间通量值都要小于23m的观测值,这种通量差别表明:23m高度的观测结果更接近当地生态系统与大气之间的通量交换值,在此种生态类型条件下用涡度相关法测碳通量时,在23m、39m两层高度之间仍然存在大气平流现象;该试验区植被在冬季仍然可以进行光合作用,而且光合作用所吸收的CO2大于呼吸作用所排放的CO2,因此该种生态系统在冬季仍表现为碳汇;春季的碳通量值为冬季的2倍以上。对不同季节内两层高度通量值的相关性也作了分析,结果表明冬季发生在23m和39m两层高度之间的大气平流量占总通量的比率要大于春季。

 
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