搜索结果: 1-12 共查到“理学 the 1990s”相关记录12条 . 查询时间(0.062 秒)
印度夏季风（ISM）爆发通常发生于2024年5月末到6月初，标志着印度雨季的来临，具有很强的年际变率。ISM爆发的早晚对印度农业播种时间和夏季气候有重要影响。因此，许多研究者致力于寻找ISM爆发的影响因子，以提升对它的预测。以往的研究主要侧重于揭示影响ISM爆发的热带系统，例如厄尔尼诺-南方涛动、热带季节内振荡等。
“坐地日行八万里”，描绘的是世人周知的我们所处的地球每日相对于地轴的自转。但少有人知道，地球的瞬时自转轴相对于地球本体的位置， 称为地极移动，简称极移，其实也在不停的运动。日月引力造成的海潮和大地变形、洋流、风、大气压变化、陆地水储量变化、冰川消融、地震和洋底压力变化等等都会引起极移。科学研究发现，极移一方面以周年和钱德勒周期跳着“圆舞曲”，一方面也在朝一个方向莲步轻移。一直以来，极移漂移的方向基...
Long-term changes in UT/LS ozone between the late 1970s and the 1990s deduced from the GASP and MOZAIC aircraft programs and from ozonesondes
UT/LS ozone GASP MOZAIC aircraft programs ozonesondes
2009/8/7
We present ozone measurements of the Global Atmospheric Sampling Program (GASP) performed from four commercial and one research aircraft in the late 1970s to compare them with respective measurements ...
Marine Meteorological Conditions and Air-Sea Exchange Processes Over Northern Baltic Sea in 1990s
Baltic Sea marine meteorology air-sea interaction surface fluxes fetch from the coast
2009/6/9
Marine meteorological conditions and air-sea exchange processes over the northern Baltic Sea
were studied using data from three open-sea lighthouse meteorological stations and the R/V Aranda automati...
Rapid channel incision of the lower Pearl River (China) since the 1990s as a consequence of sediment depletion
channel incision lower Pearl River water discharge sediment depletion
2009/5/13
This paper reported a dramatic channel incision (>10 m in the deepest cut) during the past 10 y or so in the lower Pearl River, the second largest river in terms of water discharge in China. The chan...
The co-production of a “relevant” expertise–administrative and scientific cooperation in the French water policies elaboration and implementation since the 1990s
French water policies scientific cooperation
2009/5/4
This paper aims at understanding the social and political uses of the principle of integrated management and its possible impacts on the elaboration and implementation processes of public policies in ...
Factors controlling Arctic denitrification in cold winters of the 1990s
Factors controlling Arctic denitrification cold winters the 1990s
2009/3/10
Denitrification of the Arctic winter stratosphere has been calculated using a 3-D microphysical model for the winters 1994/95, 1995/96, 1996/97 and 1999/2000. Denitrification is assumed to occur throu...
Mass balance inverse modelling of methane in the 1990s using a Chemistry Transport Model
Mass balance inverse modelling Chemistry Transport Model
2009/3/10
A mass balance inverse modelling procedure is applied with a time-dependent methane concentration boundary condition and a chemical transport model to relate observed changes in the surface distributi...
1990s长江下游干流径流量演变趋势
1990s 长江下游干流 径流趋势分析 大通站
2008/12/2
利用M-K相关分析方法和大通站1950-2000年逐月径流资料，研究了长江下游干流径流的趋势变化.研究结果表明：1950s以来长江下游径流量呈增加趋势，1990s平均径流量(30415.3m3/s)比所有其他年代平均径流都大，为近50a以来的最大值；就季节和月份而言，秋季径流明显减少；夏、冬两季径流量，增加的趋势明显，尤以冬季枯水季节径流增加最为突出. 洪水、枯水季节径流增加明显，但以枯水季节径流...
1990s长江流域降水趋势分析
长江流域 降水 趋势分析 1990s
2008/12/2
依据国家气象局提供的实测月降水和日降水资料，运用Mann-Kendall (M-K)非参数检验法验证了降水趋势，并通过空间插补法，由点扩展到面，分析了1990s长江流域降水变化特征，发现1990s长江流域降水变化以降水在时间和空间分布上的集中度的增加为主要特点：时间上，年降水的增加趋势以冬季1月和夏季6月降水的集中增加为主；一日降水量大于等于50mm的暴雨日数和暴雨量在1990s也有了较明显的增加...
Can we reconcile differences in estimates of carbon fluxes from land-use change and forestry for the 1990s
carbon fluxes land-use change forestry
2008/11/11
The effect of Land Use Change and Forestry (LUCF) on terrestrial carbon fluxes can be regarded as a carbon credit or debit under the UNFCCC, but scientific uncertainty in the estimates for LUCF remain...
Abstract: There were a series of severe floods along the middle to lower reaches of the Yangtze River (Changjiang River) in China during the 1990s. The extensive summer (June, July and Aug...