A study of the variation of urban mixed layer heights
نویسندگان
چکیده
The AERMET model is used to estimate hourly mixing heights during the Joint URBAN (2003) experiment in Oklahoma City, Oklahoma. AERMET is a simple 2-D model that requires only routine meteorological observations and an early morning atmospheric sounding to estimate convective boundary layer (CBL) growth. Estimated mixing heights are compared with observed mixing heights measured during Joint URBAN 2003. Observed CBL heights are derived from profiler data using a peak signal-to-noise ratio method. The method of deriving mixing heights from profiler data is validated using daily atmospheric sounding data. Estimated mixing heights using AERMET show good agreement with observations on days of varying temperature and cloud cover. AERMET was able to estimate the rapid boundary layer growth observed in the late morning and early afternoon hours during highly convective conditions. CBL heights of over 3000m are observed in sounding data during the late afternoon. Estimated CBL heights of over 3000m during the late afternoon agreed well with observations from the sounding and profiler data. r 2006 Elsevier Ltd. All rights reserved.
منابع مشابه
Identification and analysis of factors facilitating the green entrepreneurship process in the field of municipal waste
Background and Objective: Nowadays, the development of green entrepreneurship plays an important role in sustainable employment, reducing environmental issues, economic development, and moving towards sustainable development. Thus, the present study has been carried out aiming to identify and analyze the factors facilitating the green entrepreneurship process in the field of urban waste using a...
متن کاملUrban neighborhood regeneration; Interpretive structural modeling of the factors affecting connected public spaces
Urban planning has emphasized quicker, lighter, and cheaper methods in recent years. According to urban studies, urban public spaces are valuable factors for urban neighborhood regeneration. Although, the concept of the network (connectivity in public spaces) is not new, and various authors and researchers had applied and adapted it to different areas of urban planning, it would be a new approa...
متن کاملInvestigation of changes in surface urban heat-island (SUHI) in day and night using multi-temporal MODIS sensor data products (Case Study: Tehran metropolitan)
The term urban heat island (UHI), described the phenomenon of climate change in urban areas compared with surrounding rural areas. UHI effects include: increasing in energy and water consumption, air pollution expansion and interfering in thermal comfort. Surface urban heat island (SUHI) contains patterns of land surface temperature (LST) in urban areas that has interaction with UHI in urban ca...
متن کاملEvaluation of the mixed land use and its impact on urban sustainability. A case study: Ahvaz metropolis
Land use is often referred as the basis for urban planning. Perhaps the main reason is that the discussion of fundamental related to urban planning objectives has play the first role in the land use studies. Basic topics such as proper location, optimal allocation, diversification, functionality and &hellip which are in direct contact with comfort goals, are the last objectives of urban planner...
متن کاملExperimental study of parameters and high-order values of velocity in the behind wake of a vehicle model
In this study an experimental analysis is conducted to explore the effects of the distance placement of a trailer model on the dynamic of flow and the higher-order parameters of velocity like flatness and skeweness in the wake of a Notch back car model. In addition, the changing trends of Strouhal number and the mixed length scale are depicted. All the experiments are conducted in the aerodynam...
متن کامل