نتایج جستجو برای: atmospheric indices
تعداد نتایج: 159612 فیلتر نتایج به سال:
Hemispheric ozone variability indices derived from satellite observations and as diagnostics for coupled chemistry-climate models T. Erbertseder, V. Eyring, M. Bittner, M. Dameris, and V. Grewe German Remote Sensing Data Center, DFD, German Aerospace Center, DLR, Germany Institute for Atmospheric Physics, German Aerospace Center, DLR, Germany Received: 4 April 2006 – Accepted: 24 May 2006 – Pub...
The atmospheric correction of optical remote sensing data requires the determination of aerosol and gas optical properties. A method is presented which allows the detection of the aerosol scattering effects from optical remote sensing data at spatial sampling intervals below 5 m in cloud-free situations from cast shadow pixels. The derived aerosol optical thickness distribution is used for impr...
Traditional color and airmass corrections can typically achieve ~0.02 mag precision in photometric observing conditions. A major limiting factor is the variability in atmospheric throughput, which changes on timescales of less than a night. We present preliminary results for a system to monitor the throughput of the atmosphere, which should enable photometric precision when coupled to more trad...
Radiation transport modulates the spatial frequencies of atmospheric structures, acting as a low pass filter, which causes the power spectra of the accumulated radiance to have different power spectral slopes than the underlying atmospheric structure. Additional effects arise because of the non-stationarity of the atmosphere. The SHARC atmospheric radiance code is used to model both equilibrium...
The National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis is used to estimate time trends of, and analyze the relationships among, six indices of cyclone activity or forcing for the winters of 1949–99, over the region 208–708N. The indices are Eady growth rate and temperature variance, both at 500 hPa; surface meridional temperature gradie...
A ground-based microwave radiometer gives the possibility of providing continuously available temperature and humidity profiles of the troposphere, from which instability indices of the atmosphere could be derived. This paper studies the possibility of correlating the radiometer-based instability indices with the occurrence of intense convective activity, namely, the occurrence of lightning. Th...
Background Thermal component of the atmospheric environment is an important issue which is related to human's health. Thermal environment includes both heat exchange conditions (stress) and the physiological response (strain). The aim of this study was to measure the association of heat indices (PSI, HSI, Humidex) especially subjective one (STI) with some physiological parameters (Blood pressur...
To enhance the vegetation signal in remotely sensed data and provide an approximate measure of live green vegetation, a number of spectral vegetation indices have been developed to estimate biophysical parameters of vegetation. The sensitivity of the normalized difference vegetation index (NDVI) to the soil background and atmospheric effects has generated an increasing interest in the developme...
105 inTroducTion Civilian Tactical Emergency Medical Support (TEMS) has a long history in the United States. Enormous progress has been made during the past ten years in developing professional and operational standards within the field. However, to date, there still exists no standard of care within TEMS specifically, and more broadly for high threat pre-hospital trauma care. Current civilian ...
Eiman Zargaran, MD, MHSc, Lauren Adolph, Nadine Schuurman, PhD, Larissa Roux, MD, PhD, Damon Ramsey, MD, Richard Simons, MB, BChir, Richard Spence, MD, Andrew J. Nicol, MD, PhD, Pradeep Navsaria, MD, Juan Carlos Puyana, MD, Neil Parry, MD, Lynne Moore, PhD, Michel Aboutanos, MD, MPH, Natalie Yanchar, MD, Tarek Razek, MD, Chad G. Ball, MD, MSc, and S. Morad Hameed, MD, MPH, for the Trauma Associ...
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