scholarly journals A Global/Regional Integrated Model System‐Chemistry Climate Model: 1. Simulation Characteristics

2019 ◽  
Vol 6 (10) ◽  
pp. 2016-2030 ◽  
Author(s):  
Yong‐Cheol Jeong ◽  
Sang‐Wook Yeh ◽  
Seungun Lee ◽  
Rokjin J. Park
Keyword(s):  
Climate Model ◽  
Integrated Model ◽  
Model System ◽  
System Chemistry

Air Pollutant Trends over Denmark over the Last 37 Years as Simulated by the Integrated Model System THOR

2017 ◽  
pp. 49-54 ◽  
Author(s):  
Ulas Im ◽  
Jesper H. Christensen ◽  
Matthias Ketzel ◽  
Thomas Ellermann ◽  
Camilla Geels ◽  
...  
Keyword(s):  
Integrated Model ◽  
Model System ◽  
Air Pollutant

On the sustainability of an integrated model system with industrial, ecological, and macroeconomic components

2007 ◽  
Vol 50 (2) ◽  
pp. 122-129 ◽  
Author(s):  
H. Cabezas ◽  
H.W. Whitmore ◽  
C.W. Pawlowski ◽  
A.L. Mayer
Keyword(s):  
Integrated Model ◽  
Model System

scholarly journals Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies

2014 ◽  
Vol 14 (11) ◽  
pp. 16865-16906 ◽  
Author(s):  
L. Hoffmann ◽  
C. M. Hoppe ◽  
R. Müller ◽  
G. S. Dutton ◽  
J. C. Gille ◽  
...  
Keyword(s):  
Global Warming ◽  
Atmospheric Chemistry ◽  
Climate Model ◽  
Transport Model ◽  
Stratospheric Ozone ◽  
Michelson Interferometer ◽  
Coupled Model ◽  
Model System ◽  
Satellite Observations ◽  
The Impact

Abstract. Chlorofluorocarbons (CFCs) play a key role in stratospheric ozone loss and are strong infrared absorbers that contribute to global warming. The stratospheric lifetimes of CFCs are a measure of their global loss rates that are needed to determine global warming and ozone depletion potentials. We applied the tracer-tracer correlation approach to zonal mean climatologies from satellite measurements and model data to assess the lifetimes of CFCl3 (CFC-11) and CF2Cl2 (CFC-12). We present estimates of the CFC-11/CFC-12 lifetime ratio and the absolute lifetime of CFC-12, based on a reference lifetime of 52 yr for CFC-11. We analyzed climatologies from three satellite missions, the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS), the HIgh Resolution Dynamics Limb Sounder (HIRDLS), and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). We found a CFC-11/CFC-12 lifetime ratio of 0.47±0.08 and a CFC-12 lifetime of 111(96–132) yr for ACE-FTS, a ratio of 0.46±0.07 and a lifetime of 112(97–133) yr for HIRDLS, and a ratio of 0.46±0.08 and a lifetime of 112(96–135) yr for MIPAS. The error-weighted, combined CFC-11/CFC-12 lifetime ratio is 0.47±0.04 and the CFC-12 lifetime estimate is 112(102–123) yr. These results agree with the recent Stratosphere-troposphere Processes And their Role in Climate (SPARC) reassessment, which recommends lifetimes of 52(43–67) yr and 102(88–122) yr, respectively. Having smaller uncertainties than the results from other recent studies, our estimates can help to better constrain CFC-11 and CFC-12 lifetime recommendations in future scientific studies and assessments. Furthermore, the satellite observations were used to validate first simulation results from a new coupled model system, which integrates a Lagrangian chemistry transport model into a climate model. For the coupled model we found a CFC-11/CFC-12 lifetime ratio of 0.48±0.07 and a CFC-12 lifetime of 110(95–129) yr, based on a ten-year perpetual run. Closely reproducing the satellite observations, the new model system will likely become a useful tool to assess the impact of advective transport, mixing, and photochemistry as well as climatological variability on the stratospheric lifetimes of long-lived tracers.

Spatial and dynamic simulation for Miyun Reservoir waters in Beijing

2002 ◽  
Vol 46 (11-12) ◽  
pp. 473-479 ◽  
Author(s):  
H. Jia ◽  
S. Cheng
Keyword(s):  
Water Quality ◽  
Dynamic Simulation ◽  
Field Data ◽  
Water Quality Management ◽  
Integrated Model ◽  
Model System ◽  
Miyun Reservoir ◽  
Algae Blooms ◽  
Dynamic Simulation Model ◽  
Water Stage

In order to assist the water quality management in Miyun Reservoir, a spatial and dynamic simulation model system was built. In the model system, GIS was integrated with the WASP5 model. The integrated model system was then calibrated and verified in different sets of field data. The result showed that the integrated model system could characterize the Miyun Reservoir waters. Two scenarios were then designed and analyzed with the integrated model system. It was indicated that the water quality would improve if the cage fishery was banned, the algae blooms might occur in Miyun Reservoir if the low water stage ocurred but loads remained unchanged.

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