Using the new formula of moist available energy (MAE), the value of the MAE’s key terms ofthree heavy rainfall cases in Guangdong province in 1998 was calculated. The energetic aggregation andenergetic discharge are ...Using the new formula of moist available energy (MAE), the value of the MAE’s key terms ofthree heavy rainfall cases in Guangdong province in 1998 was calculated. The energetic aggregation andenergetic discharge are analyzed. It shows that the value of the key terms in the formula appears different featureclearly in the different precipitation period, as well as the function of each term presents in the heavy rain region.展开更多
The ecosystems on the Tibetan Plateau(TP) are highly vulnerable to climate change, rising CO2 concentration, and land-use and land-cover change(LULCC), but their contributions to changes in the gross primary productiv...The ecosystems on the Tibetan Plateau(TP) are highly vulnerable to climate change, rising CO2 concentration, and land-use and land-cover change(LULCC), but their contributions to changes in the gross primary productivity(GPP) of the TP are not clearly understood. In this study, the role of these three factors on the interannual variations(IAVs) and trends of the TP’s GPP were investigated using 12 terrestrial biosphere models. The ensemble simulations showed that climate change can explain most of the changes in the GPP, while the direct effect of LULCC and rising CO2(mainly fertilization effect) contributed 10% and-14% to the mean GPP values, 37% and -20% to the IAV, and 52% and -24% to the GPP’s trend, respectively. The LULCC showed higher contributions to the significant positive trend in the annual GPP of the TP. However, the results from different model simulations showed that considerable uncertainties were associated with the effects of LULCC on the GPP of the TP.展开更多
基金Dedicated Research Fund for Public Interest from the Ministry of Science andTechnology(2002DIA20013)"973" Key Project from the Ministry of Science and Technology (2004CB418305)
文摘Using the new formula of moist available energy (MAE), the value of the MAE’s key terms ofthree heavy rainfall cases in Guangdong province in 1998 was calculated. The energetic aggregation andenergetic discharge are analyzed. It shows that the value of the key terms in the formula appears different featureclearly in the different precipitation period, as well as the function of each term presents in the heavy rain region.
基金This research was supported by the National Key R&D Program of China[grant number 2018YFC1506602]the Key Research Program of Frontier Sciences,Chinese Academy of Sciences[grant number QYZDY-SSW-DQC012]the National Natural Science Foundation of China[grant numbers 41830967 and 41575096].
文摘The ecosystems on the Tibetan Plateau(TP) are highly vulnerable to climate change, rising CO2 concentration, and land-use and land-cover change(LULCC), but their contributions to changes in the gross primary productivity(GPP) of the TP are not clearly understood. In this study, the role of these three factors on the interannual variations(IAVs) and trends of the TP’s GPP were investigated using 12 terrestrial biosphere models. The ensemble simulations showed that climate change can explain most of the changes in the GPP, while the direct effect of LULCC and rising CO2(mainly fertilization effect) contributed 10% and-14% to the mean GPP values, 37% and -20% to the IAV, and 52% and -24% to the GPP’s trend, respectively. The LULCC showed higher contributions to the significant positive trend in the annual GPP of the TP. However, the results from different model simulations showed that considerable uncertainties were associated with the effects of LULCC on the GPP of the TP.
