Abstract The 1999 Regional Haze Rule provides a context for this review of visibility, the
science that describes it, and the use of that science in regulatory guidance. The scientific …

The Arctic region is a harbinger of global change and is warming at a rate higher than the
global average. While Arctic warming is driven by increases in anthropogenic greenhouse …

This report is the first complete assessment of the science of climate change since Working
Group I (WGI) of the IPCC produced its second report Climate Change 1995: The Science of …

Sea spray aerosols impact Earth's radiation balance by directly scattering solar radiation.
They also act as cloud condensation nuclei, thereby altering cloud properties including …

Sulfur and lead isotope ratios in the atmosphere were measured at several selected sites
(Harbin, Changchun, Dalian, Waliguan, Shanghai, Nanjing, Guiyang) in China and Tsukuba …

Results are presented from 3 years of simultaneous measurements of aerosol chemical
composition and light scattering and absorption at Barrow, Alaska. All results are reported at …

Rising levels of air-borne suspended particulate matter with aerodynamic diameter≤ 2.5 μm
(PM 2.5) in the Asian mega cities is a serious cause of concern. A severe SMOG (smoke+ …

Fifteen years (1980 to 1995) of observations of weekly mean concentrations of 18
constituents in the aerosol of the lower Arctic troposphere at Alert, Canada, have been …

Nitrogen isotopic signatures are very useful for identifying sources of atmospheric NOx or
NO3−. Although soil is a major source of atmospheric nitric oxide (NO), yet nitrogen isotopic …

During the winter and spring the North American Arctic is impacted by anthropogenic black
carbon (BC) in “Arctic Haze” pollution from sources mainly located in Europe and Russia …