搜索结果: 1-15 共查到“地球科学总论 drought”相关记录18条 . 查询时间(0.082 秒)
Response of the water use efficiency of natural vegetation to drought in Northeast China
natural vegetation drought water use efficiency (WUE)
2018/4/9
Drought has become a problem that is universally faced by global terrestrial ecosystems. Northeast China is located in a region sensitive to global climate changes, and one of the main impacts of clim...
Drought left 225 million trees dead in the U.S. Southwest in 2002. Nine years later, it killed 300 million trees in Texas. This past year, 12 million trees died in California.Drought left 225 million ...
Predicting the response of the Amazon rainforest to persistent drought conditions under current and future climates: a major challenge for global land surface models
major challenge global land surface models
2014/12/19
While a majority of global climate models project drier and longer dry seasons over the Amazon under higher CO2 levels, large uncertainties surround the response of vegetation to persistent droughts i...
Process-based simulation of seasonality and drought stress in monoterpene emission models
Process-based simulation seasonality and drought stress monoterpene emission models
2010/1/21
In this paper we propose the application of a mechanistic method for considering the seasonal dynamics of emission potential using the "Seasonal Isoprenoid synthase Model" (Lehning et al., 2001). We t...
Drought and vegetation stress monitoring in Portugal using satellite data
Drought and vegetation stress monitoring Portugal satellite data
2009/12/16
Remote sensed information on vegetation and soil moisture, namely the Normalised Difference Vegetation Index (NDVI) and the Soil Water Index (SWI), is employed to monitor the spatial extent, severity ...
Probabilistic analysis of drought spatiotemporal characteristics inThessaly region, Greece
drought spatiotemporal characteristics Thessaly region
2009/12/14
The temporal and spatial characteristics of meteorological drought are investigated to provide a framework for sustainable water resources management in the region of Thessaly, Greece. Thessaly is the...
Drought and vegetation stress monitoring in Portugal using satellite data
Drought vegetation stress monitoring Portugal satellite data
2009/12/8
Remote sensed information on vegetation and soil moisture, namely the Normalised Difference Vegetation Index (NDVI) and the Soil Water Index (SWI), is employed to monitor the spatial extent, severity ...
Response of temperate grasslands at different altitudes to simulated summer drought differed but scaled with annual precipitation
temperate grasslands simulated summer drought annual precipitation
2010/1/21
Water is an important resource for plant life. Since climate scenarios for Switzerland predict an average reduction of 20% in summer precipitation until 2070, understanding ecosystem responses to wate...
'Killer' Southeast Drought Low on Scale, Says Study--Others Were Far Worse; Population, Planning Are the Real Problems（图）
'Killer' Southeast Drought Population Planning the Real Problems
2009/12/10
A 2005-2007 dry spell in the southeastern United States destroyed billions of dollars of crops, drained municipal reservoirs and sparked legal wars among a half-dozen states—but the havoc came not fro...
Drought reduced monoterpene emissions from the evergreen Mediterranean oak Quercus ilex: results from a throughfall displacement experiment
monoterpene emissions evergreen Mediterranean oak Quercus ilex displacement experiment
2010/1/20
The effects of water limitations on the emission of biogenic volatile organic compounds are not well understood. Experimental approaches studying drought effects in natural conditions are still missin...
Hydrometeorological and vegetation indices for the drought monitoring system in Tuscany Region,Italy
Hydrometeorological and vegetation indices drought monitoring system Tuscany Region
2010/1/28
We present here the first experiments for an integrated system that is under development for drought monitoring and water resources assessment in Tuscany Region in central Italy. The system is based o...
Fluxes and 13C isotopic composition of dissolved carbon and pathways of methanogenesis in a fen soil exposed to experimental drought
Fluxes 13C isotopic composition dissolved carbon pathways methanogenesis
2010/1/18
Peatlands contain a carbon stock of global concern and significantly contribute to the global methane burden. The impact of drought and rewetting on carbon cycling in peatland ecosystems is thus curre...
This paper evaluates climate change effects on drought severity in the region of Thessaly, Greece. The Standardized Precipitation Index (SPI) has been used for estimation of drought severity. A geogra...
Adapting water allocation management to drought scenarios
water allocation management drought scenarios
2009/12/30
Climate change dynamics have significant consequences on water resources on a watershed scale. With water becoming scarcer and susceptible to variation, the planning and reallocation decisions in wate...
Net ecosystem carbon exchange in three contrasting Mediterranean ecosystems – the effect of drought
Net ecosystem carbon exchange Mediterranean ecosystems effect of drought
2010/1/14
Droughts reduce gross primary production (GPP) and ecosystem respiration (Reco), contributing to most of the inter-annual variability in terrestrial carbon sequestration. In seasonally dry climates (M...