搜索结果: 1-15 共查到“大气科学 trend”相关记录22条 . 查询时间(0.304 秒)
Solar radiation trend across China in recent decades: a revisit with quality-controlled data
Solar radiation China recent decades quality-controlled data
2011/1/19
Solar radiation is one of the most important factors affecting climate and environment, and its long-term variation is of much concern in climate change studies. In the light of the limited number of ...
Trend and characteristics of atmospheric emissions of Hg, As, and Se from coal combustion in China, 1980–2007
atmospheric Hg As Se coal combustion
2010/12/28
Emissions of hazardous trace elements in China are of great concern because of their negative impacts on local air quality as well as on regional environmental health and ecosystem risks. In this pape...
A decadal regional and global trend analysis of the aerosol optical depth using a data-assimilation grade over-water MODIS and Level 2 MISR aerosol products
the aerosol optical depth a data-assimilation grade over-water MODIS Level 2 MISR aerosol products
2010/11/30
Using the ten-year (2000–2009) Data-Assimilation (DA) quality Terra MODIS and MISR aerosol products, as well as 7 years of Aqua MODIS, we studied both regional and global aerosol trends over oceans. T...
Multi-annual changes of NOx emissions in megacity regions: nonlinear trend analysis of satellite measurement based estimates
NOx emissions megacity regions nonlinear trend analysis satellite measurement
2010/9/21
Hazardous impact of air pollutant emissions from megacities on atmospheric composition on regional and global scales is currently an important issue in atmospheric research. However, the quantificatio...
HFC-23 (CHF3) emission trend response to HCFC-22 (CHClF2) production and recent HFC-23 emission abatement measures
HFC-23 (CHF3) emission trend HCFC-22 (CHClF2) production recent HFC-23 emission abatement measures
2010/9/1
We present observations of lower-tropospheric mole fractions of HFC-23 measured by "Medusa" GC/MSD instruments from ambient air sampled in situ at the Advanced Global Atmospheric Gases Experiment (AGA...
Technical Note: Trend estimation from irregularly sampled, correlated data
Trend estimation irregularly sampled and correlated data
2010/8/16
Estimation of a trend of an atmospheric state variable is usually performed by fitting a linear regression line to a set of data of this variable sampled at different times. Often these data are irreg...
Validation of the GRAPE single view aerosol retrieval for ATSR-2 and insights into the long term global AOD trend over the ocean
the GRAPE single ATSR-2 the long term global AOD the ocean
2010/8/13
The Global Retrieval of ATSR Cloud Parameters and Evaluation (GRAPE) project has produced a global data-set of cloud and aerosol properties from the Along Track Scanning Radiometer-2 (ATSR-2) instrume...
Atmospheric oxygen and carbon dioxide observations from two European coastal stations 2000–2005: continental influence, trend changes and APO climatology
Atmospheric oxygen carbon dioxide European coastal APO climatology
2010/2/21
Seeking for baseline conditions has biased the atmospheric carbon dioxide (CO2) and later on also oxygen (O2) monitoring networks towards remote marine stations, missing part of the variability that i...
Trend in ice moistening the stratosphere – constraints from isotope data of water and methane
ice moistening isotope data water methane
2010/1/18
Water plays a major role in the chemistry and radiative budget of the stratosphere. Air enters the stratosphere predominantly in the tropics, where the very low temperatures around the tropopause cons...
Surface ozone trend details and interpretations in Beijing, 2001–2006
Surface ozone trend details interpretations Beijing
2009/12/3
Beijing is a megacity situated in the rapidly developing Beijing-Tianjin-Hebei region of northern China. In this study, we analyze data on ozone and nitrogen oxide levels obtained at six urban sites i...
High resolution cyclostratigraphy of the early Eocene–new insights into the origin of the Cenozoic cooling trend
X-ray fluorescence Geomagnetic Polarity Time Scale Early Eocene Climatic Optimum
2009/12/3
Here we present a high-resolution cyclostratigraphy based on X-ray fluorescence (XRF) core scanning data from a new record retrieved from the tropical western Atlantic (Demerara Rise, ODP Leg 207, Sit...
Using ground-based solar and lunar infrared spectroscopy to study the diurnal trend of carbon monoxide in the Mexico City boundary layer
ground-based solar lunar infrared spectroscopy diurnal trend carbon monoxide Mexico City boundary layer
2009/11/9
Carbon monoxide (CO) is an important pollutant in urban agglomerations. Quantifying the total burden of this pollutant in a megacity is challenging because not only its surface concentration but also ...
Is there a trend in cirrus cloud cover due to aircraft traffic?
Is there a trend in cirrus cloud cover due to aircraft traffic?
2009/2/16
Trends in cirrus cloud cover have been estimated based on 16 years of data from ISCCP (International Satellite Cloud Climatology Project). The results have been spatially correlated with aircraft dens...
Temperature climatology and trend estimates in the UTLS region as observed over a southern subtropical site, Durban, South Africa
Temperature climatology UTLS region southern subtropical site Durban South Africa
2009/1/19
Temperature trends in the UTLS region are under-reported, particularly in the Southern Hemisphere, and yet temperature is one of the most important indicators of changes in dynamical and radiative pro...
Search for evidence of trend slow-down in the long-term TOMS/SBUV total ozone data record: the importance of instrument drift uncertainty
long-term TOMS/SBUV total ozone instrument drift uncertainty
2009/1/15
We have developed a merged ozone data set (MOD) for the period October 1978 through June 2006 combining total ozone measurements (Version 8 retrieval) from the TOMS (Nimbus 7, Earth Probe) and SBUV/SB...