摘要:

Particulate sulfate in air was monitored daily from 15 June 1978 to 31 December 1979 at Whiteface Mountain, New York. The daily SO42−concentrations were related to surface‐air trajectory ensembles to assess the relative contribution from the U.S. and from Canada. During the study period the site was influenced approximately equally by continental polar and maritime tropical air masses. However the maritime air masses from the U.S. were the principal conveyors of high SO42−concentrations at this site and transported about 4 to 5 times more SO42−than did the continental polar air masses from

ISSN:0094-8276    

DOI:10.1029/GL009i001p00079

年代:1982

数据来源: WILEY

摘要:

We have compared power spectra of Manley's record of central England temperatures for the Maunder minimum with later periods. We find that the power in the ∼23 year cycle is statistically significant in the Maunder minimum portion of this temperature time series. This gives indirect support to the recent suggestion that the solar cycle persisted in the Maunder minimum even though normal sunspot activity was not observed. Our results also indicate that the ∼23 year cycle was stronger during the Maunder minimum than later times in this rec

ISSN:0094-8276    

DOI:10.1029/GL009i001p00083

年代:1982

数据来源: WILEY

摘要:

About 11,000 published natural gas analyses of helium are used in the estimation of the average global scale accumulation and concentration of radiogenic helium in sediments. Simple lognormal statistics is employed to derive a net accumulation rate between 1 × 105to 6.7 × 105helium atoms per cubic meter of reservoir rock per second. This accumulation rate permitted to infer an average helium concentration of non‐reservoir sediments of about 67 ppm. By assuming a simple closed system model it is shown that deep seated sources of helium are not necessary to explain the present regime of helium in sediments on a global scale. Helium accumulation rates and concentrations obtained by this method are in close agreement with existing fundamental geochemical estimates of uranium and thorium in rather average type sedime

ISSN:0094-8276    

DOI:10.1029/GL009i001p00087

年代:1982

数据来源: WILEY

摘要:

Airborne size distribution and dry deposition data for seven elements (K, Rb, Cs, Ca, Sr, Ba, and Pb) were obtained in a remote subalpine ecosystem in Yosemite National Park, California during 1976 and 1977. During periods of partial snow cover, resuspension of local soil was minimal and all seven elements showed a net transport into the ecosystem from surrounding regions. With moderate winds and dry conditions, resuspension of local surface material increased, equalling or exceeding net downward flux for all metals except lead.

ISSN:0094-8276    

DOI:10.1029/GL009i001p00091

年代:1982

数据来源: WILEY

摘要:

Air samples collected at several heights above the Arctic Ocean contained at least two types of bacteria and five different fungal spores which could elevate the freezing temperature of water droplets. It was observed that the freezing temperature increased logarithmically with the number of cells per drop up to a maximum temperature dependent upon species. Bacteria were more effective than fungal spores but, unlike the spores, they lost their activity under laboratory growth conditions.Maximum concentration of nearly 10 microbial cells per liter occurs in clouds and 1 per liter in air outside clouds. However, numbers and varieties of microbial cells in excess of those found near sea ice surface level were observed up to 7 km.

ISSN:0094-8276    

DOI:10.1029/GL009i001p00094

年代:1982

数据来源: WILEY

摘要:

This comment attempts to point out that the analysis of Davis et. al. on O3/H2O interference is in agreement with our published theoretical and experimental results, but their calibrations of OH measurements appear to be inconsistent. Possible resolution of this inconsistency is suggested.

ISSN:0094-8276    

DOI:10.1029/GL009i001p00098

年代:1982

数据来源: WILEY

ISSN:0094-8276    

DOI:10.1029/GL009i001p00101

年代:1982

数据来源: WILEY

摘要:

A multichannel filter radiometer (MFR) on Defense Meteorological Satellites (DMS) that measured total ozone on a global‐scale from March 1977 ‐ February 1980 is described. The total ozone data measured by the MFR were compared with total ozone data taken by surfaced‐based Dobson spectrophotometers. When comparisons were made for five months, the Dobson spectrophotometer measured 2‐5% more total ozone than the MFR. Comparisons between the Dobson spectrophotometer and the MFR showed a reduced RMS difference as the comparisons were made at closer proximity. A Northern Hemisphere total ozone distribution obtained from MFR data is pr

ISSN:0094-8276    

DOI:10.1029/GL009i001p00105

年代:1982

数据来源: WILEY