土壤湿度

时间变化的分析表明只有ERA的土壤湿度能很好地描述观测的年际变化。

Only ERA-Interim can well represent the interannual variations of observed soil moisture .

土壤湿度对亚高山草地土壤夏季CO2排放日变化的影响

Effects of Soil Moisture on CO_2 Emissions in Subalpine Meadow Soil

研究人员通过一个计算机模型测出了水分胁迫,该模型计算了树木获得的水分与它们需要的水分之间的对比,同时考虑了降雨、气温、土壤湿度和融雪时间等因素。

The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed , taking into account such things as rainfall , air temperature , dampness of soil , and the timing of snowmelt ．

稻麦轮作生态系统中土壤湿度对N2O产生与排放的影响

Impact of soil humidity on N_2O production and emission from a rice-wheat rotation ecosystem

土壤湿度仅在废渣改良施用处理中与RS成正相关。

Soil moisture positively affected the RS only in the sludge-amended treatment .

基于TM数据的地表土壤湿度反演试验研究

A Study of Soil Moisture Retrieving Based on TM Remotely-sensed Data

根据这一原理，美国国家航空与航天局于2002年进行了基于地表面反射GPS信号的遥感土壤湿度实验。

The experimental result proves that the reflected GPS signal is sensitive to the surface soil moisture characteristic .

基于3G和WSN的森林土壤湿度采集系统研究

Forest Soil Humidity Gathering System Based on 3G and Wireless Sensor Network

土壤湿度行内比行间高27.6%，土壤pH值行内比行间低11.7%。

Soil humidity was 27.6 % higher and soil pH was 11.7 % higher within the rows than in the inter-rows .

不同土壤湿度下柠条光合速率对CO2浓度和辐射强度响应的模拟研究海洋工程环境条件模拟船舶空调系统的仿真与建模

Impacts of CO_2 Concentration and Radiant Intensity on C. intermedia Photosynthetic Rate Under Different Soil Moisture with a Simulation Condition

从MODIS资料提取土壤湿度信息的主成分分析方法

Principal Component Analysis Method Acquiring Soil Moisture Information from MODIS Data

大春作物生态系统CO2排放具有明显的季节变化，变化规律主要受温度、土壤湿度、植株生长、施肥方式、水分管理等因素影响；

CO_2 emission of Soil-rice ecosystem and soil respiration of soil-maize ecosystem had obviously seasonal variation , They were affected by environmental factor and factitious factor .

用NOAA卫星资料监测土壤湿度方法的探讨

Study of monitoring soil humidity method with NOAA satellite data

用NOAA卫星可见光和红外资料估算甘肃省东部农田区土壤湿度

Estimating farmland soil moisture in Eastern Gansu Province Using NOAA satellite data

使用MODIS数据监测土壤湿度

Monitoring soil moisture content with MODIS data

正常CO2浓度条件下，土壤湿度为田间持水量的45%～60%时，土壤活性有机碳的含量最高。

Under different soil moisture conditions , the content of SAC is highest when soil moisture is between 45 % ~ 60 % of soil water holding capacity ;

应用SURFER软件绘制土壤湿度时间等值线图的方法

Applying the SURFER Software on Drawing Topographic Map of Soil Temperature Time

高的土壤湿度能提高N素利用效率，但对P、Ca的影响不大；

Nitrogen use efficiency of plants would be improved in a higher soil moisture condition , but P and Ca use efficiency had no clear response to the increase of soil moisture .

用辐射传输理论提出的地表微波辐射极化指数PI的定义，分别指出了土壤湿度、地面粗糙、植被层和大气层的各自影响。

Denoting the polarization difference , a polarization index ( PI ) of microwave radiance from the terrain surface is derived from the radiative transfer model .

土壤湿度与Ts／NDVI斜率的定量关系有待进一步研究。

So we need do more research on the relationship between the Ts / NDVI slope and soil moisture using MODIS data .

在此基础上，建立了水分平衡模型并进行了校核，计算出的土壤湿度变化与时域反射仪（TDR）探头测量的数据一致。

The model was calibrated and soil moisture change is consistent with time domain reflectrometry ( TDR ) data .

以月水量平衡模型为基础，应用地理信息系统（GIS）技术，探讨模型参数的地区分布规律，建立分布式流域水文模型，模拟大尺度流域的土壤湿度和径流过程。

On the basis of the GIS technique , a distributed two parameters monthly water balance model is developed and applied to the Hangsui and Ganjiang Rivers in the Changjiang ( Yangtze ) River Basins .

利用ANN进行土壤湿度反演，效果很好，但仍需进一步改进，论文给出了结合先验知识提高反演精度的做法和尝试结果，表明利用先验知识的确能够提高湿度反演的精度。

The precision of soil moisture can be improved by using priori knowledge in the ANN inversion . The method is introduced and the effect is showed in this thesis .

结果表明：紫藤叶片的Pn、Tr及WUE对土壤湿度和光照强度的变化具有明显的阈值响应。

The results showed that the P_n , T_r and WUE had evident threshold responses to the variations of soil moisture and light intensity .

在高CO2浓度下，贝加尔针茅根和叶的C/N比随土壤湿度的增加而减小，但在当前环境CO2浓度下并未表现出这种变化趋势；

Under CO_2 concentration enrichment , the C / N ratio in Stipa baicalensis leaf decreases along with soil moisture increment . But , this tendency is not shown under ambient CO_2 concentration .

真实的实验数据和WKB解法为土壤湿度的微波辐射遥感提供了科学依据。

The real experimental data and WKB theory provide scientific basis for the microwave remote sensing of soil moisture .

对前期降雨量与土壤湿度，边缘分布由核密度刻画，相依结构利用AIC准则进行选择。

Precipitation and soil saturation to early , edge by a nuclear density distribution depict , dependency structure using AIC criterion selection .

辐射畸变不仅对SAR辐射标定造成困难，而且严重影响了影像分类、土壤湿度信息提取、森林蓄积量信息提取等应用。

The radiometric distortions not only bring on difficulties to precise radiometric calibration , but also affect the SAR imagery application , including image classification , soil moisture information and forest biomass information extraction from SAR backscatter coefficients .

多元回归分析发现CH4通量与地下5cm温度显著相关，尤其是在土壤湿度变化不大的旱季，土壤表层温度为影响CH4通量的主导因子。

CH 4 flux was significantly correlated with soil temperature at 5 cm depth , especially during dry season when the soil moisture was rather stable .

分析了ASC利用C星监测资料生成如热带气旋监测、雾监测、土壤湿度、火情监测、水情监测、积雪监测和海冰监测等部分人机交互产品的原理和处理方法。

The principles and methods of partial interactive products such as tropical cycle monitoring , fog monitoring , soil moisture , fire monitoring , flood monitoring , snow cover monitoring and sea ice monitoring were introduced .