Henan Provincial Climate Center

Zhengzhou, China

Henan Provincial Climate Center

Zhengzhou, China
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Ji X.-J.,CMA Key Laboratory of Agromterological Ensuring and Applied Technigue | Ji X.-J.,Henan Provincial Climate Center | Cheng L.,Henan Institute of Meteorological Science | Zhu Y.-Y.,CMA Key Laboratory of Agromterological Ensuring and Applied Technigue | Song N.,Chinese Academy of Agricultural Sciences
Chinese Journal of Ecology | Year: 2014

Based on the meteorological data and the data of the growth period of winter wheat from 30 agrometeoro-logical stations of Henan Province, the effective precipitation was calculated by using the U. S. Department of Agriculture Soil Conservation method. Meanwhile, the water requirement (ETc) of winter wheat in the whole growing period during 1981-2010 in Henan Province was estimated by using FAO Penman-Monteith equation and crop coefficient method recommended by Food and Agriculture Organization. The spatial-temporal distribution characteristics of ETc and water deficit (WD) and their major climatic impact factors were analyzed using the mathematical statistics. The results showed that the Penman-Monteith model well simulated the ET0 of winter wheat during the whole growing period in Henan Province in the past 30 years, with a correlation coefficient of 0. 85 (P<0. 01) between the modeled ET0 and the observed 20 cm pan evaporation during the same period in same stations. The mean precipitation and effective precipitation of the 30 years during the whole growing period of winter wheat were 244. 0 and 114. 9 mm, respectively. The mean ETc and WD for the study area were 408. 0 and 293. 1 mm for the whole growth period during the past 30 years, respectively. Spatially, precipitation and effective precipitation decreased gradually from south to north, which was opposite to the distribu tion characteristics of ETc and WD. The differences in precipitation and effective precipitation among different regions increased during 1981-2010, while the differences in ETc and WD among different regions decreased. Temporally, ETc and WD of Henan Province showed downward trends which were not significant. The variations of ETc and WD differed spatially. The ETc and WD increased in west and north of Henan Province, but reduced in the rest areas. Partial correlation analysis indicated that wind speed reduction during the past 30 years was the main cause of decreased ETc, however, the WD had the closest relationship with precipitation. Stepwise regression analysis suggested that the changes of ETc and WD had close relationships with meteorologi cal factors and growth stages of winter wheat as a whole, and the contribution of each factor to ETc and WD differed, among them, the whole growing days and precipitation were the biggest one, respectively. © 2014, editorial Board of Chinese Journal of Ecology. All rights reserved


Ji X.-J.,Key Laboratory of Agrometerological Ensuring and Applied Technique | Ji X.-J.,Henan Provincial Climate Center | Cheng L.,Key Laboratory of Agrometerological Ensuring and Applied Technique | Cheng L.,Henan Institute of Meteorological Science | And 2 more authors.
Chinese Journal of Applied Ecology | Year: 2015

Based on the analysis of water requirement and water deficit during development stage of winter wheat in recent 30 years (1981-2010) in Henan Province, the effective precipitation was calculated using the U.S. Department of Agriculture Soil Conservation method, the water requirement (ETc) was estimated by using FAO Penman-Monteith equation and crop coefficient method recommended by FAO, combined with the climate change scenario A2 (concentration on the economic envelopment) and B2 (concentration on the sustainable development) of Special Report on Emissions Scenarios (SRES), the spatial and temporal characteristics of impacts of future climate change on effective precipitation, water requirement and water deficit of winter wheat were estimated. The climatic impact factors of ETc and WD also were analyzed. The results showed that under A2 and B2 scenarios, there would be a significant increase in anomaly percentage of effective precipitation, water requirement and water deficit of winter wheat during the whole growing period compared with the average value from 1981 to 2010. Effective precipitation increased the most in 2030s under A2 and B2 scenarios by 33.5% and 39.2%, respectively. Water requirement increased the most in 2010s under A2 and B2 scenarios by 22.5% and 17.5%, respectively, and showed a significant downward trend with time. Water deficit increased the most under A2 scenario in 2010s by 23.6% and under B2 scenario in 2020s by 13.0%. Partial correlation analysis indicated that solar radiation was the main cause for the variation of ETc and WD in future under A2 and B2 scenarios. The spatial distributions of effective precipitation, water requirement and water deficit of winter wheat during the whole growing period were spatially heterogeneous because of the difference in geographical and climatic environments. A possible tendency of water resource deficiency may exist in Henan Province in the future. ©, 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved.


Jia Z.-J.,Chengdu University of Information Technology | Ji X.-J.,Henan Provincial Climate Center
Wetland Science | Year: 2014

It is very important for studying surface water and energy balance and regional climate characters to improve the estimation accuracy of evapotranspiration from the wetlands. The evapotranspiration from Carex lasiocarpa marshes in Sanjiang Plain was simulated by the Penman, FAO Penman-Monteith, Priestley-Taylor, Blaney-Criddle, Hargreaves, McCloud, Linacre and Makkink models. The results showed that the values of evapotranspiration simulated with the eight models were significantly higher than those measured with eddy covariance system (averagely 92.8% higher) when crop coefficient recommended by FAO was adopted. With crop coefficient modified by local observation data, estimation accuracy of each model was markedly improved except for Makkink model. However, the Penman, FAO Penman-Monteith and Priestley-Taylor models, which are based on energy balance, showed better estimation accuracy than the Blaney-Criddle, Hargreaves, McCloud and Linacre models, which are based on temperature. Among the models based on energy balance, the values simulated by Priestley-Taylor model were closest to the measured ones. While among the models based on temperature, the values simulated by Hargreaves model were closest to the measured ones.


Wang J.-J.,Henan Provincial Climate Center | Hu C.-H.,Zhengzhou University | Zhou D.-D.,Xuchang Meteorological Office | Zhu L.-L.,Henan Provincial Climate Center
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

Using the decadal wind velocity data of 107 meteorological stations in Henan Province from 1961 to 2012, variations on Spatial-temporal distributional characteristics were analyzed, and the scale invariance analysis of decadal wind velocity was analyzed. The results showed that: the mean decadal rainfall and its standardized errors among the meteorological stations were 2.3 m/s and 0.68 m/s, respectively, which probability distributions were not subject to normal distribution. The cumulative difference of decadal wind velocity and its standard error among the meteorological stations had the same extremely linear upward trends, which could pass the significance test at the 0.001 significant level. The scale indexes of decadal wind velocity were all above 0.5, indicating that time series of decadal wind velocity of all meteorological stations were persistent. Spatial variability on scale index was small, which showed that the scale index of decadal wind velocity obeyed normal distribution among the meteorological stations. © 2015 Taylor & Francis Group, London, UK.


Wang J.-J.,Henan Provincial Climate Center | Pan P.,Henan Provincial Climate Center | Hu C.-H.,Zhengzhou University | Li F.-X.,Henan Provincial Climate Center
Chinese Journal of Applied Ecology | Year: 2015

Using the ten-day sunshine duration data of 107 meteorological stations in Henan Province from 1961 to 2012, spatial-temporal variation characteristics of ten-day sunshine duration were analyzed, and the scale invariance analysis of ten-day sunshine duration was studied by using the method of detrended fluctuation analysis. The results showed that the means of ten-day sunshine duration and its standardized error among stations were 57.90 and 9.18 h, respectively, and their probability distributions were not subject to normal distribution. The cumulative abnormal of sunshine duration had a distinct linear increasing trend, however, its square deviation among the stations was of phase characteristics. The scale index of ten-day sunshine of each station was above 0.5, indicated that time series of scale index was of permanence. Variation of scale index among stations was small, which obeyed the normal distribution. ©, 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved.

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