نتایج جستجو برای: gc and gcms

تعداد نتایج: 16832498  

2007
E. McBean

In the threshold of the appearance of global warming from theory to reality, extensive research has focused on predicting the impact of potential climate change on water resources using results from Global Circulation Models (GCMs). This research carries this further by statistical analyses of long term meteorological and hydrological data. Seventy years of historical trends in precipitation, t...

2008
Andrew J. Monaghan David H. Bromwich David P. Schneider

[1] We compare new observationally-based data sets of Antarctic near-surface air temperature and snowfall accumulation with 20th century simulations from global climate models (GCMs) that support the Intergovernmental Panel on Climate Change Fourth Assessment Report. Annual Antarctic snowfall accumulation trends in the GCMs agree with observations during 1960–1999, and the sensitivity of snowfa...

Journal: :Earth System Dynamics Discussions 2021

Abstract. The sixth phase of the Coupled Model Intercomparison Project (CMIP6) is latest modeling effort for general circulation models to simulate and project various aspects climate change. Many (GCMs) participating in CMIP6 provide archived output that can be used calculate effective sensitivity (ECS) forecast future temperature change based on emissions scenarios from several Shared Socioec...

2001
PAVEL YA. GROISMAN RAYMOND S. BRADLEY BOMIN SUN

One of the possible ways to check the adequacy of the physical description of meteorological elements in global climate models (GCMs) is to compare the statistical structure of these elements reproduced by models with empirical data from the world climate observational system. The success in GCM development warranted a further step in this assessment. The description of the meteorological eleme...

Journal: :Journal of chromatography. A 2014
Jessica A Sagona James E Dukett Harmonie A Hawley Monica A Mazurek

Cloud water samples from Whiteface Mountain, NY were used to develop a combined sampling and gas chromatography-mass spectrometric (GCMS) protocol for evaluating the complex mixture of highly polar organic compounds (HPOC) present in this atmospheric medium. Specific HPOC of interest were mono- and di keto-acids which are thought to originate from photochemical reactions of volatile unsaturated...

2014
Tony Chang Andrew J. Hansen Nathan Piekielek

Projected climate change at a regional level is expected to shift vegetation habitat distributions over the next century. For the sub-alpine species whitebark pine (Pinus albicaulis), warming temperatures may indirectly result in loss of suitable bioclimatic habitat, reducing its distribution within its historic range. This research focuses on understanding the patterns of spatiotemporal variab...

2013
Zhenchun Hao Qin Ju Weijuan Jiang Changjun Zhu

The Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC AR4) presents twenty-two global climate models (GCMs). In this paper, we evaluate the ability of 22 GCMs to reproduce temperature and precipitation over the Tibetan Plateau by comparing with ground observations for 1961~1900. The results suggest that all the GCMs underestimate surface air temperature and most mo...

2014
Siong Fong Sim Terri Zhuan Ean Lee Nurul Aida Lu Mohd Irwan Lu Benedict Samling

Fourier Transform Infrared (FTIR) and Gas Chromatography Mass Spectrometry (GCMS) are two common instruments used for analysis of edible oils. The output signal is often analysed on the software attached to the workstations. The processing software is usually individualised for a specific source. The output of GCMS cannot be analysed on the FTIR hence analysts often need to juggle between instr...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Jasper F Kok

Mineral dust aerosols impact Earth's radiation budget through interactions with clouds, ecosystems, and radiation, which constitutes a substantial uncertainty in understanding past and predicting future climate changes. One of the causes of this large uncertainty is that the size distribution of emitted dust aerosols is poorly understood. The present study shows that regional and global circula...

2015
Kaijie Yang Baoliang Chen Lizhong Zhu

The substantial aggregation of pristine graphene nanosheets decreases its powerful adsorption capacity and diminishes its practical applications. To overcome this shortcoming, graphene-coated materials (GCMs) were prepared by loading graphene onto silica nanoparticles (SiO2). With the support of SiO2, the stacked interlamination of graphene was held open to expose the powerful adsorption sites ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید