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Tag:agricultural field
Author:  None
Pypdd is a positive accumulated temperature glacier surface mass balance model that calculates glacier melting by accumulating temperature degrees above zero. **Historical background **: PyPDD was developed by the PyPDD team with the aim of providing a simple and effective positive accumulated temperature model to support glacier surface mass balance calculations. The development of this model responds to the demand for rapid assessment of large-scale glacier melting **Technical features **: • Using the positive accumulated temperature method to calculate glacier melting, with a simple structure and few parameters • Support rapid assessment of large-scale glacier mass balance • Analyze the impact of climate change on glacier melting • Estimate glacier runoff and water resources • Seamless integration with the Python scientific ecosystem • High computational efficiency, suitable for large-scale applications **Core functions **: • Calculation of glacier surface mass balance • Rapid assessment of large-scale glacier melting • Analysis of the impact of climate change on glacier melting • Glacier runoff and water resource estimation • Prediction of glacier mass balance under different climate scenarios **Application case **: • Global monitoring of glacier mass balance changes • Glacier melting prediction under different climate scenarios • Assessment of the contribution of glacier runoff to water resources • Sensitivity analysis of mountain glaciers to climate change • Glacier Change Prediction in Glacier Tourist Areas **Limitations **: • Simplified the process of glacier energy balance, which may affect accuracy • Depends on the quality and spatial distribution of temperature data • Unable to simulate the detailed physical processes inside glaciers • Limited ability to simulate responses to extreme climate events • Mainly applicable to seasonal snow accumulation and glacier surface processes **Input parameters **: • Temperature data (daily average temperature or monthly average temperature) • Precipitation data • Positive accumulated temperature factor (ablation coefficient) • Altitude gradient parameters • Simulate time steps and total duration **Output result **: • Glacier surface mass balance • Ablation volume and accumulation volume • Glacier runoff estimation • Prediction results under different climate scenarios
Tag Positive accumulated temperature model glacier melting mass balance water resources Python Rapid assessment climate change
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AERMOD(AMS/EPA REGULATORY Model (model) is a steady-state smoke plume model established by the National Environmental Protection Agency (EPA) and the American Meteorological Society (AMS) on the basis of the industrial composite source model framework. It is based on the diffusion statistical theory and assumes that the concentration distribution of pollutants conforms to the normal distribution within a certain range, and the Gaussian diffusion formula is used to establish the model 。 AERMOD model does not involve the influence of dry and wet deposition, but introduces new atmospheric boundary layer and atmospheric diffusion theory such as planetary boundary layer to further improve ISC model. Therefore, AERMOD model can be applied to the emission of various emission sources (including point source, non-point source and body source), It can also be used to simulate various emission diffusion situations, such as rural environment and urban environment, flat terrain and complex terrain, ground source and elevated source. According to the relevant provisions of "technical acceptance rules for the application of multi-source model to verify the atmospheric environmental capacity of key cities", the air pollution sources in the atmospheric capacity planning area can be divided into point source, non-point source (body source) and line source. According to the monitoring data provided by Baoshan environmental monitoring station and the provisions on material balance of discharged pollutants in the notice on the verification of sewage charge collection (HF [2003] No. 64) issued by the State Environmental Protection Administration, a list of pollution sources is established.

Tag AERMOD air pollution