Uncertainties in the Radiative Forcing Due to Sulfate Aerosols

From: Journal of the Atmospheric Sciences | Date: March 1, 2004| Author: Berglen, Tore F; Isaksen, Ivar S A; Stordal, Frode; Sundet, Jostein K; Myhre, Gunnar | Copyright information

ABSTRACT

Radiative transfer calculations based on a new sulfate distribution from a chemistry-transport model simulation have been performed. A wide range of sensitivity experiments have been performed to illustrate the large uncertainty in the radiative forcing due to sulfate aerosols. The most important factors seem to be processes involved in the mixing of sulfate aerosols with other particles and uncertainties in the relative humidities. These factors can explain much of the large ...

Related newspaper, magazine, and journal articles from HighBeam Research

Uncertainties in the Radiative Forcing Due to Sulfate Aerosols
Journal of the Atmospheric Sciences ; ABSTRACT Radiative transfer calculations based on a new sulfate distribution from a chemistry-transport model simulation have been performed. A wide range of sensitivity experiments have been performed to illustrate the large uncertainty in the radiative forcing due to sulfate aerosols. The most
RELATIVE HUMIDITY TRENDS
Bulletin of the American Meteorological Society ; Relative humidity strongly affects atmospheric visibility, directly influencing cloud height as well as the formation of smog and fog. Nonetheless, compared to the number of studies of temperature and precipitation records, relatively little work has been done examining archival data of relative
RELATIVE HUMIDITY OFTEN HIGH OUTDOORS, LOW INDOORS IN WINTER
The Milwaukee Journal Sentinel ; An interesting question came my way this past week from one of our viewers. She had been told that the humidity gets very low in homes during the winter, but she had been noticing on our weathercasts that the relative humidity was often at 80% or 90%. She didn't understand. Her confusion was
Use dew point, not relative humidity, to measure discomfort
The Milwaukee Journal Sentinel ; We got an interesting e-mail question from Dan. He was confused because the air mass felt so dry over the weekend and the afternoon relative humidity was still in the 45% range. He wanted to know why the humidity was so high, and does it ever get under 10% in the Milwaukee area? Relative humidity
Relationship between Shortwave Cloud Radiative Forcing and Local Meteorological Variables Compared in Observations and Several Global Climate Models
Journal of Climate ; ABSTRACT The relations between local monthly mean shortwave cloud radiative forcing and aspects of the resolved-scale meteorological fields are investigated in hindcast simulations performed with 12 of the global coupled models included in the model intercomparison conducted as part of the
An aerosol climatology at Kyoto: Observed local radiative forcing and columnar optical properties
Journal of Applied Meteorology ; ABSTRACT In order to evaluate the radiative effect of the atmospheric aerosol at Kyoto, Japan, surface solar irradiance and columnar aerosol optical properties were observed in the period between September 1998 and December 2001. The aerosol optical thickness, which is an indicator of the columnar
Moisture advection using relative humidity
Journal of Applied Meteorology ; (Manuscript received December 1998, in final form 3 February 2000) ABSTRACT This study introduces a moisture advection formulation that contains relative humidity. In the sigma coordinate system, rewriting the mixing ratio conservation equation in terms of relative humidity leads to an equation
Uncertainties in radiative forcing due to surface albedo changes caused by land-use changes
Journal of Climate ; ABSTRACT A radiative transfer model has been used for estimating the radiative forcing due to land-use changes. Five global datasets for current vegetation cover and three datasets of preagriculture vegetation have been adopted. The vegetation datasets have been combined with three datasets for
Seasonal Variation of Aerosol Direct Radiative Forcing and Optical Properties Estimated from Ground-Based Solar Radiation Measurements
Journal of the Atmospheric Sciences ; ABSTRACT The surface direct radiative forcing and optical properties of aerosols have been analyzed from a ground-based solar radiation measurement, which was made under clear-sky conditions in Tsukuba, Japan, over two years from April 1997 to March 1999. The global and diffuse irradiances in the
Of dew points and relative humidity
The Milwaukee Journal Sentinel ; STORM TEAM 4 Of dew points and relative humidity By PAUL JOSEPH Chief Meteorologist Saturday, November 15, 2003 Very typical mid-November weather is expected this weekend. A weak area of low pressure will bring lots of clouds and the possibility of scattered showers. One of our readers, Wesley,