Cairo University

MTPR Journal

 

AN EARLIER NATURAL MECHANISM PROPOSAL FOR THE CLOSURE OF THE OZONE HOLE AND THE PRESENT 30% CLOSURE

& doi: https://doi.org/10.1142/9789814317511_0038
SHAHINAZ M. YOUSEF, SIHAM A. AL-KUHAIMI and AISHA BEBARS
Astronomy & Meteorology Dept., Faculty of Science, Cairo University, Egypt
Girls College of Education, Scientific Dept., Malaz Riyadh, Saudi Arabia
National Research Institute of Astronomy and Geophysics, NRIAG, Helwan, Egypt



Vol./Issue: 11 , id: 341

A prolonged period of reduced solar activity of the order of few decades is expected owing to the presence of weak solar cycles series like those around 1800 and 1900 AD. Reduced UV flux is forecasted. The multitude of phytoplanktons in the Antarctic Ocean which are harmed by excessive UV passing through the ozone hole are expected to recover owing to the reduced solar UV doze even with the existence of ozone hole. An increase of only 10% of the phytoplankton would remove about 5 Gigatons of carbon dioxide from the atmosphere annually (which is equal to the amount of carbon dioxide emitted currently by fossil fuel utilization) and sink it into the ocean. Reduction of carbon dioxide from the atmosphere will lead to cooling of the troposphere and hence warming of Antarctic stratospheric clouds which are the sight of ozone destruction. Eventually, this procedure will hopefully lead to Antarctic ozone hole closure. The paper also discuss the implication of the 1997 solar induced climate change on the appearance of the Arctic ozone hole and the reduction of the Antarctic ozone hole. Anther more serious solar indsolarinduced climate change is currently on due to the end of the first weak solar cycle number 23 and the start of predicated second weaker solar cycle number 24. A climate change, which has already brought global cooling to the earth. The Ozone hole has been closed by 30% in 2007 as prdicted which a triumph is for the subject of sun-Earth connections. It is also predicted that further closures in the coming few years will occur due to solar induced climate changes. The forecast of the ozone hole closure was predicted in earlier papers.