Year 2013, Volume 37 , Issue 3, Pages 286 - 305 2013-03-01

Trend analysis of 41 years of sunshine duration data for Turkey
Trend analysis of 41 years of sunshine duration data for Turkey

Uğur YILDIRIM [1] , İsmail Ömer YILMAZ [2] , Bülent Gültekin AKINOĞLU [3]


Accurate knowledge of solar irradiation reaching the earth's surface is one of the most important pieces of information to use in global warming studies. In this respect, trend analysis of solar irradiation data for the long term is an essential evaluation method of climate change. Sunshine duration data have been recorded for many years, directly correlated to solar irradiation. Therefore, trend analysis of sunshine duration data is also an important research topic of climate change. Global research from different regions of the earth showed diming (1950s to about 1980s) and brightening (about 1980s to recent years) periods in solar irradiation. The present work aims to obtain the trends of the measured sunshine duration over Turkey. Seasonal and yearly bright sunshine hours of 36 selected stations are used and quite similar trends are seen. A decreasing trend (between 1970 to about 1990) is clearly identified for most of the stations. Nevertheless, the increasing period after 1990 is not so clear; however, we observed either zero trend variation or a reduction in the rate of decrease of sunshine duration for most of the locations. The decreasing period might be attributed to human-induced air pollution.
Accurate knowledge of solar irradiation reaching the earth's surface is one of the most important pieces of information to use in global warming studies. In this respect, trend analysis of solar irradiation data for the long term is an essential evaluation method of climate change. Sunshine duration data have been recorded for many years, directly correlated to solar irradiation. Therefore, trend analysis of sunshine duration data is also an important research topic of climate change. Global research from different regions of the earth showed diming (1950s to about 1980s) and brightening (about 1980s to recent years) periods in solar irradiation. The present work aims to obtain the trends of the measured sunshine duration over Turkey. Seasonal and yearly bright sunshine hours of 36 selected stations are used and quite similar trends are seen. A decreasing trend (between 1970 to about 1990) is clearly identified for most of the stations. Nevertheless, the increasing period after 1990 is not so clear; however, we observed either zero trend variation or a reduction in the rate of decrease of sunshine duration for most of the locations. The decreasing period might be attributed to human-induced air pollution.
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Primary Language tr
Journal Section Articles
Authors

Author: Uğur YILDIRIM

Author: İsmail Ömer YILMAZ

Author: Bülent Gültekin AKINOĞLU

Dates

Publication Date : March 1, 2013

Bibtex @ { tbtkengineering144895, journal = {Turkish Journal of Engineering and Environmental Sciences}, issn = {1300-0160}, eissn = {1303-6157}, address = {}, publisher = {TUBITAK}, year = {2013}, volume = {37}, pages = {286 - 305}, doi = {10.3906/muh-1301-11}, title = {Trend analysis of 41 years of sunshine duration data for Turkey}, key = {cite}, author = {YILDIRIM, Uğur and YILMAZ, İsmail Ömer and AKINOĞLU, Bülent Gültekin} }
APA YILDIRIM, U , YILMAZ, İ , AKINOĞLU, B . (2013). Trend analysis of 41 years of sunshine duration data for Turkey. Turkish Journal of Engineering and Environmental Sciences , 37 (3) , 286-305 . DOI: 10.3906/muh-1301-11
MLA YILDIRIM, U , YILMAZ, İ , AKINOĞLU, B . "Trend analysis of 41 years of sunshine duration data for Turkey". Turkish Journal of Engineering and Environmental Sciences 37 (2013 ): 286-305 <https://dergipark.org.tr/en/pub/tbtkengineering/issue/12119/144895>
Chicago YILDIRIM, U , YILMAZ, İ , AKINOĞLU, B . "Trend analysis of 41 years of sunshine duration data for Turkey". Turkish Journal of Engineering and Environmental Sciences 37 (2013 ): 286-305
RIS TY - JOUR T1 - Trend analysis of 41 years of sunshine duration data for Turkey AU - Uğur YILDIRIM , İsmail Ömer YILMAZ , Bülent Gültekin AKINOĞLU Y1 - 2013 PY - 2013 N1 - doi: 10.3906/muh-1301-11 DO - 10.3906/muh-1301-11 T2 - Turkish Journal of Engineering and Environmental Sciences JF - Journal JO - JOR SP - 286 EP - 305 VL - 37 IS - 3 SN - 1300-0160-1303-6157 M3 - doi: 10.3906/muh-1301-11 UR - https://doi.org/10.3906/muh-1301-11 Y2 - 2020 ER -
EndNote %0 Turkish Journal of Engineering and Environmental Sciences Trend analysis of 41 years of sunshine duration data for Turkey %A Uğur YILDIRIM , İsmail Ömer YILMAZ , Bülent Gültekin AKINOĞLU %T Trend analysis of 41 years of sunshine duration data for Turkey %D 2013 %J Turkish Journal of Engineering and Environmental Sciences %P 1300-0160-1303-6157 %V 37 %N 3 %R doi: 10.3906/muh-1301-11 %U 10.3906/muh-1301-11
ISNAD YILDIRIM, Uğur , YILMAZ, İsmail Ömer , AKINOĞLU, Bülent Gültekin . "Trend analysis of 41 years of sunshine duration data for Turkey". Turkish Journal of Engineering and Environmental Sciences 37 / 3 (March 2013): 286-305 . https://doi.org/10.3906/muh-1301-11
AMA YILDIRIM U , YILMAZ İ , AKINOĞLU B . Trend analysis of 41 years of sunshine duration data for Turkey. Turkish Journal of Engineering and Environmental Sciences. 2013; 37(3): 286-305.
Vancouver YILDIRIM U , YILMAZ İ , AKINOĞLU B . Trend analysis of 41 years of sunshine duration data for Turkey. Turkish Journal of Engineering and Environmental Sciences. 2013; 37(3): 305-286.

Authors of the Article
Uğur YILDIRIM [1]
İsmail Ömer YILMAZ [2]
Bülent Gültekin AKINOĞLU [3]