Two Methods for Removing the Effect of Horizontal Fluxes from Stacked Aircraft Measurements of Shortwave Absorption by Clouds
نویسندگان
چکیده
Cloud absorption, as inferred from the difference between net fluxes measured with stacked aircraft, is strongly affected by horizontal inhomogeneity. The simplest way to compensate for variability effects is to perform grand averages over flight legs (Valero et al. 1997). If the flight legs are long enough (several hundred km), averaging leads to a reliable estimate of column absorption (Ramanathan and Vogelmann 1997). The only problem here is that the amount of information on “true” absorption (the data harvest) returned from an expensive measurement program is very limited.
منابع مشابه
Validation of surface retrieved cloud optical properties with in situ measurements at the Atmospheric Radiation Measurement Program (ARM) South Great Plains site
[1] Cloud optical properties inferred from a multifilter rotating shadowband radiometer have been validated against in situ measurements during the second ARM Enhanced Shortwave Experiment (ARESE II) field campaign at the ARM South Great Plains (SGP) site. On the basis of eight aircraft in situ vertical profiles (constructed from measurements), Forward Spectra Scattering Probe (FSSP), we find t...
متن کاملReflectance vs. Transmittance Analysis of Simulated ARM Enhanced Shortwave Experiment Two-Aircraft Measurements of Fractal Clouds
361 Figure 1. Log-log plot of the variance at a given scale, vs. that scale (similar to the power spectrum or a 2nd order structure function). It shows (scale-invariant) ARM cloud liquid water path data plus two computed radiation fields, IPA (“simple theory”) and MC (“better theory”). The MC curve, showing a scale break at the “radiative smoothing scale” 0 . 200-300 m for marine Sc, agrees wit...
متن کامل3D Detection of Power-Transmission Lines in Point Clouds Using Random Forest Method
Inspection of power transmission lines using classic experts based methods suffers from disadvantages such as highel level of time and money consumption. Advent of UAVs and their application in aerial data gathering help to decrease the time and cost promenantly. The purpose of this research is to present an efficient automated method for inspection of power transmission lines based on point c...
متن کاملEarth ’ s Annual Global Mean Energy Budget J . T . Kiehl and Kevin
The purpose of this paper is to put forward a new estimate, in the context of previous assessments, of the annual global mean energy budget. A description is provided of the source of each component to this budget. The top-ofatmosphere shortwave and longwave flux of energy is constrained by satellite observations. Partitioning of the radiative energy throughout the atmosphere is achieved throug...
متن کاملSolar radiation budget and radiative forcing due to aerosols and clouds
[1] This study integrates global data sets for aerosols, cloud physical properties, and shortwave radiation fluxes with a Monte Carlo Aerosol-Cloud-Radiation (MACR) model to estimate both the surface and the top-of-atmosphere (TOA) solar radiation budget as well as atmospheric column solar absorption. The study also quantifies the radiative forcing of aerosols and that of clouds. The observatio...
متن کامل