scholarly journals Comment on “Climate forcing by the volcanic eruption of Mount Pinatubo” by David H. Douglass and Robert S. Knox

2005 ◽  
Vol 32 (20) ◽  
Author(s):  
Alan Robock
Keyword(s):  
Volcanic Eruption ◽  
Climate Forcing ◽  
Mount Pinatubo

scholarly journals Investigation of weather anomalies in the low-latitude islands of the Indian Ocean in 1991

2015 ◽  
Vol 33 (7) ◽  
pp. 789-804 ◽  
Author(s):  
A. Réchou ◽  
S. Kirkwood
Keyword(s):  
Indian Ocean ◽  
El Niño ◽  
Volcanic Eruption ◽  
El Nino ◽  
Sunshine Duration ◽  
Global Precipitation Climatology Project ◽  
The Philippines ◽  
Quasi Biennial Oscillation ◽  
Mount Pinatubo ◽  
The Indian Ocean

Abstract. Temperature, precipitation and sunshine duration measurements at meteorological stations across the southern Indian Ocean have been analysed to try to differentiate the possible influence of the Mount Pinatubo volcanic eruption in the Philippines in June 1991 and the normal weather forcings. During December 1991, precipitation on the tropical islands Glorieuses (11.6° S) and Mayotte (12.8° S) was 4 and 3 times greater, respectively, than the climatological mean (precipitation is greater by more than than twice the standard deviation (SD)). Mean sunshine duration (expressed in sun hours per day) was only 6 h on Mayotte, although the sunshine duration is usually more than 7.5 ± 0.75 h, and on the Glorieuses it was only 5 h, although it is usually 8.5 ± 1 h. Mean and SD of sunshine duration are based on December (1964–2001 for Mayotte, 1966–1999 for the Glorieuses). The Madden–Julian Oscillation (MJO) is shown to correlate best with precipitation in this area. Variability controlling the warm zone on these two islands can be increased by the Indian Ocean Dipole (IOD), El Niño, the quasi-biennial oscillation (QBO) and/or solar activity (sunspot number, SSN). However, temperature records of these two islands show weak dependence on such forcings (temperatures are close to the climatological mean for December). This suggests that such weather forcings have an indirect effect on the precipitation. December 1991 was associated with unusually low values of the MJO index, which favours high rainfall, as well as with El Niño, eastern QBO and high SSN, which favour high variability. It is therefore not clear whether the Mount Pinatubo volcanic eruption had an effect. Since the precipitation anomalies at the Glorieuses and Mayotte are more or less local (Global Precipitation Climatology Project (GPCP) data) and the effect of the Pinatubo volcanic cloud should be more widespread, it seems unlikely that Pinatubo was the cause. Islands at higher southern latitudes (south of Tromelin at 15.5° S) were not affected by the Pinatubo eruption in terms of sunshine duration, precipitation or temperature.

Radiative Climate Forcing by the Mount Pinatubo Eruption

Science ◽  
1993 ◽  
Vol 259 (5100) ◽  
pp. 1411-1415 ◽  
Author(s):  
P. Minnis ◽  
E. F. Harrison ◽  
L. L. Stowe ◽  
G. G. Gibson ◽  
F. M. Denn ◽  
...  
Keyword(s):  
Climate Forcing ◽  
Mount Pinatubo ◽  
Pinatubo Eruption

scholarly journals Radiative forcing from the 1991 Mount Pinatubo volcanic eruption

1998 ◽  
Vol 103 (D12) ◽  
pp. 13837-13857 ◽  
Author(s):  
Georgiy L. Stenchikov ◽  
Ingo Kirchner ◽  
Alan Robock ◽  
Hans-F. Graf ◽  
Juan Carlos Antuña ◽  
...  
Keyword(s):  
Volcanic Eruption ◽  
Radiative Forcing ◽  
Mount Pinatubo
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