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The Role of Clouds in Global Radiation Changes Measured in Israel during the Last Sixty Years
Year:
2019
Source of publication :
American Journal of Climate Change
Authors :
Cohen, Shabtai
;
.
Stanhill, Gerald
;
.
Volume :
8
Co-Authors:

I. Paudel - Department of Forestry and Natural Resources, Purdue University, IN, USA

Facilitators :
From page:
61
To page:
76
(
Total pages:
16
)
Abstract:

An analysis of global radiation measurements and fractional cloud cover observations made in the Israel Meteorological Service’s network of climate stations demonstrated a significant decrease in the transmittance of solar radiation through the atmosphere during the last 60 years. The major cause was the reduced transparency of clouds. Under completely overcast skies with complete cloud cover transmission in the industrialized central coastal region decreased from 0.41 in the mid-20th century to 0.21 in the first decade of the 21st century. Under cloudless skies the reduction in the transmission of global radiation was less, from 0.79 to 0.71, and not statistically significant. Similar but somewhat smaller changes were observed in the less industrialized central hill region. Multi-linear analysis showed that since 1970, 61% of the measured decline in global radiation was attributable to changes in fractional cloud cover but only 2% to the marked increase in local fuel combustion; there was no statistically significant interaction between the two parameters.

Note:
Related Files :
Cloud
Dimming and Brightening
Direct and Indirect Aerosol Effects
Fossil Fuel Combustion
Fractional Cloud Cover
Show More
Related Content
More details
DOI :
10.4236/ajcc.2019.81004
Article number:
0
Affiliations:
Database:
Google Scholar
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
44903
Last updated date:
02/03/2022 17:27
Creation date:
11/11/2019 10:37
Scientific Publication
The Role of Clouds in Global Radiation Changes Measured in Israel during the Last Sixty Years
8

I. Paudel - Department of Forestry and Natural Resources, Purdue University, IN, USA

The Role of Clouds in Global Radiation Changes Measured in Israel during the Last Sixty Years

An analysis of global radiation measurements and fractional cloud cover observations made in the Israel Meteorological Service’s network of climate stations demonstrated a significant decrease in the transmittance of solar radiation through the atmosphere during the last 60 years. The major cause was the reduced transparency of clouds. Under completely overcast skies with complete cloud cover transmission in the industrialized central coastal region decreased from 0.41 in the mid-20th century to 0.21 in the first decade of the 21st century. Under cloudless skies the reduction in the transmission of global radiation was less, from 0.79 to 0.71, and not statistically significant. Similar but somewhat smaller changes were observed in the less industrialized central hill region. Multi-linear analysis showed that since 1970, 61% of the measured decline in global radiation was attributable to changes in fractional cloud cover but only 2% to the marked increase in local fuel combustion; there was no statistically significant interaction between the two parameters.

Scientific Publication
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