The influence of Middle Range Energy Electrons on atmospheric chemistry and regional climate. / Arsenovic, P.; Rozanov, E.; Stenke, A.; Funke, B.; Wissing, J. M.; Mursula, K.; Tummon, F.; Peter, T.
In: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 149, 11.2016, p. 180-190.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - The influence of Middle Range Energy Electrons on atmospheric chemistry and regional climate
AU - Arsenovic, P.
AU - Rozanov, E.
AU - Stenke, A.
AU - Funke, B.
AU - Wissing, J. M.
AU - Mursula, K.
AU - Tummon, F.
AU - Peter, T.
PY - 2016/11
Y1 - 2016/11
N2 - We investigate the influence of Middle Range Energy Electrons (MEE; typically 30-300 keV) precipitation on the atmosphere using the SOCOL3-MPIOM chemistry-climate model with coupled ocean. Model simulations cover the 2002-2010 period for which ionization rates from the AIMOS dataset and atmospheric composition observations from MIPAS are available. Results show that during geomagnetically active periods MEE significantly increase the amount of NOy and HOx in the polar winter mesosphere, in addition to other particles and sources, resulting in local ozone decreases of up to 35%. These changes are followed by an intensification of the polar night jet, as well as mesospheric warming and stratospheric cooling. The contribution of MEE also substantially enhances the difference in the ozone anomalies between geomagnetically active and quiet periods. Comparison with MIPAS NOy observations indicates that the additional source of NOy from MEE improves the model results, however substantial underestimation above 50 km remains and requires better treatment of the NOy source from the thermosphere. A surface air temperature response is detected in several regions, with the most pronounced warming occurring in the Antarctic during austral winter. Surface warming of up to 2 K is also seen over continental Asia during boreal winter. (C) 2016 The Authors. Published by Elsevier Ltd.
AB - We investigate the influence of Middle Range Energy Electrons (MEE; typically 30-300 keV) precipitation on the atmosphere using the SOCOL3-MPIOM chemistry-climate model with coupled ocean. Model simulations cover the 2002-2010 period for which ionization rates from the AIMOS dataset and atmospheric composition observations from MIPAS are available. Results show that during geomagnetically active periods MEE significantly increase the amount of NOy and HOx in the polar winter mesosphere, in addition to other particles and sources, resulting in local ozone decreases of up to 35%. These changes are followed by an intensification of the polar night jet, as well as mesospheric warming and stratospheric cooling. The contribution of MEE also substantially enhances the difference in the ozone anomalies between geomagnetically active and quiet periods. Comparison with MIPAS NOy observations indicates that the additional source of NOy from MEE improves the model results, however substantial underestimation above 50 km remains and requires better treatment of the NOy source from the thermosphere. A surface air temperature response is detected in several regions, with the most pronounced warming occurring in the Antarctic during austral winter. Surface warming of up to 2 K is also seen over continental Asia during boreal winter. (C) 2016 The Authors. Published by Elsevier Ltd.
KW - Middle Energy Electrons
KW - Mesosphere
KW - Ozone
KW - Atmospheric Chemistry
KW - Climate
KW - SOLAR PROTON EVENT
KW - PARTICLE-PRECIPITATION EVENTS
KW - ION CHEMISTRY
KW - NITRIC-OXIDE
KW - COSMIC-RAYS
KW - MODEL
KW - MESOSPHERE
KW - TEMPERATURE
KW - VARIABILITY
KW - OZONE
U2 - 10.1016/j.jastp.2016.04.008
DO - 10.1016/j.jastp.2016.04.008
M3 - статья
VL - 149
SP - 180
EP - 190
JO - Journal of Atmospheric and Solar-Terrestrial Physics
JF - Journal of Atmospheric and Solar-Terrestrial Physics
SN - 1364-6826
ER -
ID: 105535555