The H 2 SO 4 -HNO 3 -NH 3 system at high humidities and in fogs: 1. Spatial and temporal patterns in the San Joaquin Valley of California

The H2SO1⁄2-HNO3-NH3 System at High Humidities and in Fogs 1. Spatial and Temporal Patterns in the San Joaquin Valley of California

A systematic haracterization of the atmospheric H2SO,,-HNO3-NH 3 system was conducted in the fog water, the aerosol, and the gas phase at a network of sites in the San Joaquin Valley of California. Spatial patterns of concentrations were established that reflect the distribution of SO 2, NO,,, and NH 3 emissions within the valley. The concept of atmospheric alkalinity was introduced to interpre...

The H 2 SO 4 - HNO 3 - NH 3 system at high humidities and in

Fogwater chemistry in an urban atmosphere

Analyses of fogwater collected by inertial impaction in the Los Angeles basin and the San Joaquin Valley indicated unusually high concentrations of major and minor ions. The dominant ions measured were NO3-, SO,• 2-, NH,• +, and H +. Nitrate exceeded sulfate on an equivalent basis by a factor of 2.5 in the central and coastal regions of the Los Angeles basin but was approximately equal in the e...

Spatial and temporal patterns of benthic macrofauna in Gorgan Bay, south Caspian Sea, Iran

We quantified the distribution, abundance and assemblage structure of macrofauna at 22 stations in Gorgan bay, seasonally in 2012-2013. Also, depth, temperature, salinity, DO, TOM and sediment particle size were measured in each station. The highest concentration of TOM was measured near the western littoral zone (10.22) while the mouth part and north-eastern area was characterized by the lowes...

Organic matter in central California radiation fogs.

Organic matter was studied in radiation fogs in the San Joaquin Valley of California during the California Regional Particulate Air Quality Study (CRPAQS). Total organic carbon (TOC) concentrations ranged from 2 to 40 ppm of C. While most organic carbon was found in solution as dissolved organic carbon (DOC), 23% on average was not dissolved inside the fog drops. We observe a clear variation of...