scholarly journals Characterization of the seasonal cycle of south Asian aerosols: A regional-scale modeling analysis

2007 ◽  
Vol 112 (D22) ◽  
Author(s):  
Bhupesh Adhikary ◽  
Gregory R. Carmichael ◽  
Youhua Tang ◽  
L. Ruby Leung ◽  
Yun Qian ◽  
...  
Keyword(s):  
South Asian ◽  
Seasonal Cycle ◽  
Regional Scale ◽  
Scale Modeling ◽  
Modeling Analysis

Landscape Biodiversity Characterization in Ecoregion 29 Using MODIS

2013 ◽  
pp. 815-831
Author(s):  
Nitin Kumar Tripathi ◽  
Aung Phey Khant
Keyword(s):  
Climate Change ◽  
Remote Sensing ◽  
Global Warming ◽  
Forest Type ◽  
Regional Scale ◽  
Remote Sensing Data ◽  
Modis Data ◽  
Moderate Resolution ◽  
Landscape Biodiversity

Biodiversity conservation is a challenging task due to ever growing impact of global warming and climate change. The chapter discusses various aspects of biodiversity parameters that can be estimated using remote sensing data. Moderate resolution satellite (MODIS) data was used to demonstrate the biodiversity characterization of Ecoregion 29. Forest type map linked to density of the study area was also developed by MODIS data. The outcome states that remote sensing and geographic information systems can be used in combination to derive various parameters related to biodiversity surveillance at a regional scale.

Design, Modeling, Analysis, and Characterization of a Pin-on-Disk Tribometer with a Novel Spring Loading Mechanism

2021 ◽  
pp. 29-39
Author(s):  
Ghulam Hussain ◽  
Shehroze Faisal ◽  
Iftikhar Ahmad ◽  
Wasim Ahmed Khan ◽  
M. Kamran Abbasi ◽  
...  
Keyword(s):  
Modeling Analysis ◽  
Pin On Disk

scholarly journals Characterization of Surface Evidence of Groundwater Flow Systems in Continental Mexico

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2459
Author(s):  
Alessia Kachadourian-Marras ◽  
Margarita M. Alconada-Magliano ◽  
José Joel Carrillo-Rivera ◽  
Edgar Mendoza ◽  
Felipe Herrerías-Azcue ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Water Cycle ◽  
Regional Scale ◽  
Ground Surface ◽  
The Public ◽  
Groundwater Flow Systems ◽  
Human Needs ◽  
Flow Systems ◽  
Vegetation And Climate

The dynamics of the underground part of the water cycle greatly influence the features and characteristics of the Earth’s surface. Using Tóth’s theory of groundwater flow systems, surface indicators in Mexico were analyzed to understand the systemic connection between groundwater and the geological framework, relief, soil, water bodies, vegetation, and climate. Recharge and discharge zones of regional groundwater flow systems were identified from evidence on the ground surface. A systematic hydrogeological analysis was made of regional surface indicators, published in official, freely accessible cartographic information at scales of 1:250,000 and 1:1,000,000. From this analysis, six maps of Mexico were generated, titled “Permanent water on the surface”, “Groundwater depth”, “Hydrogeological association of soils”, “Hydrogeological association of vegetation and land use”, “Hydrogeological association of topoforms”, and “Superficial evidence of the presence of groundwater flow systems”. Mexico’s hydrogeological features were produced. The results show that 30% of Mexico is considered to be discharge zones of groundwater flow systems (regional, intermediate, and recharge). Natural recharge processes occur naturally in 57% of the country. This work is the first holistic analysis of groundwater in Mexico carried out at a national–regional scale using only the official information available to the public. These results can be used as the basis for more detailed studies on groundwater and its interaction with the environment, as well as for the development of integrative planning tools to ensure the sustainability of ecosystems and satisfy human needs.

Regional-scale modeling of greenhouse gas fluxes

2012 ◽  
pp. 23-55
Author(s):  
Pavel Juruš ◽  
Petr Musilek ◽  
Yaqiong Li ◽  
James Rodway
Keyword(s):  
Greenhouse Gas ◽  
Regional Scale ◽  
Scale Modeling ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

scholarly journals Attributing ozone and its precursors to land transport emissions in Europe and Germany

2020 ◽  
Vol 20 (13) ◽  
pp. 7843-7873 ◽  
Author(s):  
Mariano Mertens ◽  
Astrid Kerkweg ◽  
Volker Grewe ◽  
Patrick Jöckel ◽  
Robert Sausen
Keyword(s):  
Carbon Monoxide ◽  
Air Quality ◽  
Nitrogen Oxides ◽  
Radiative Forcing ◽  
Seasonal Cycle ◽  
Regional Scale ◽  
Model System ◽  
Anthropogenic Emission ◽  
Po Valley ◽  
Transport Emissions

Abstract. Land transport is an important emission source of nitrogen oxides, carbon monoxide, and volatile organic compounds. The emissions of nitrogen oxides affect air quality directly. Further, all of these emissions serve as a precursor for the formation of tropospheric ozone, thus leading to an indirect influence on air quality. In addition, ozone is radiatively active and its increase leads to a positive radiative forcing. Due to the strong non-linearity of the ozone chemistry, the contribution of emission sources to ozone cannot be calculated or measured directly. Instead, atmospheric chemistry models equipped with specific source attribution methods (e.g. tagging methods) are required. In this study we investigate the contribution of land transport emissions to ozone and ozone precursors using the MECO(n) model system (MESSy-fied ECHAM and COSMO models nested n times). This model system couples a global and a regional chemistry climate model and is equipped with a tagging diagnostic. We investigate the combined effect of long-range-transported ozone and ozone which is produced by European emissions by applying the tagging diagnostic simultaneously and consistently on the global and regional scale. We performed two simulations each covering 3 years with different anthropogenic emission inventories for Europe. We applied two regional refinements, i.e. one refinement covering Europe (50 km resolution) and one covering Germany (12 km resolution). The diagnosed absolute contributions of land transport emissions to reactive nitrogen (NOy) near ground level are in the range of 5 to 10 nmol mol−1. This corresponds to relative contributions of 50 % to 70 %. The largest absolute contributions appear around Paris, southern England, Moscow, the Po Valley, and western Germany. The absolute contributions to carbon monoxide range from 30 nmol mol−1 to more than 75 nmol mol−1 near emission hot-spots such as Paris or Moscow. The ozone which is attributed to land transport emissions shows a strong seasonal cycle with absolute contributions of 3 nmol mol−1 during winter and 5 to 10 nmol mol−1 during summer. This corresponds to relative contributions of 8 % to 10 % during winter and up to 16 % during summer. The largest values during summer are confined to the Po Valley, while the contributions in western Europe range from 12 % to 14 %. Only during summer are the ozone contributions slightly influenced by the anthropogenic emission inventory, but these differences are smaller than the range of the seasonal cycle of the contribution to land transport emissions. This cycle is caused by a complex interplay of seasonal cycles of other emissions (e.g. biogenic) and seasonal variations of the ozone regimes. In addition, our results suggest that during events with large ozone values the ozone contributions of land transport and biogenic emissions increase strongly. Here, the contribution of land transport emissions peaks up to 28 %. Hence, our model results suggest that land transport emissions are an important contributor during periods with large ozone values.

Characterization of Zirconium Hydrides and Phase Field Approach to a Mesoscopic-Scale Modeling of Their Precipitation

2008 ◽  
Vol 5 (3) ◽  
pp. 101161 ◽  
Author(s):  
Z. Zhao ◽  
M. Blat-Yrieix ◽  
J.-P. Morniroli ◽  
A. Legris ◽  
L. Thuinet ◽  
...  
Keyword(s):  
Phase Field ◽  
Mesoscopic Scale ◽  
Field Approach ◽  
Scale Modeling ◽  
Zirconium Hydrides
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