Absorbing aerosols and pre-summer monsoon hydroclimate variability over the Indian subcontinent: The challenge in investigating links Export

@article{bollasinaAR2009, abstract = {Sub-monthly evolution of the interannual variations of absorbing aerosols and related hydrometeorology over South Asia in the pre-monsoon period is investigated from the analysis of pentad-resolution observational datasets. It is shown that pre-monsoon (late April - early May) variations are characterized by increased aerosols, reduced cloudiness and precipitation, and increased downward shortwave radiation. Lead-lag regressions indicate the significant influence of synoptic-scale advection (and related vertical motion) in simultaneously shaping the aerosol distribution and associated significant hydroclimate (precipitation, cloudiness, surface shortwave radiation, 2-m air temperature) over the Indo-Gangetic Plain. The above findings can be interpreted as manifestation of the aerosol ” semi-direct” effect if one is not mindful of the prevailing circulation anomalies and their concurrent impact on aerosol and hydroclimate. The complex interplay among aerosols, dynamics and precipitation also shows the challenge of extracting the aerosol impact from an observational analysis. Finally, the analysis points to the pitfalls of a columnar, circulation-blind framework in investigating aerosol-monsoon interactions, a concern of relevance in analyses of the impact of long-term aerosol trends, as well.}, author = {Bollasina, Massimo and Nigam, Sumant}, citeulike-article-id = {4995817}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.atmosres.2009.06.008}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/S0169809509001860}, day = {26}, doi = {10.1016/j.atmosres.2009.06.008}, issn = {01698095}, journal = {Atmospheric Research}, keywords = {india, monsoon, rain, soot}, month = {June}, posted-at = {2009-06-29 10:12:51}, priority = {5}, title = {Absorbing aerosols and pre-summer monsoon hydroclimate variability over the Indian subcontinent: The challenge in investigating links}, url = {http://dx.doi.org/10.1016/j.atmosres.2009.06.008}, year = {2009} }

TY - JOUR ID - bollasinaAR2009 L3 - citeulike-article-id:4995817 N2 - Sub-monthly evolution of the interannual variations of absorbing aerosols and related hydrometeorology over South Asia in the pre-monsoon period is investigated from the analysis of pentad-resolution observational datasets. It is shown that pre-monsoon (late April - early May) variations are characterized by increased aerosols, reduced cloudiness and precipitation, and increased downward shortwave radiation. Lead-lag regressions indicate the significant influence of synoptic-scale advection (and related vertical motion) in simultaneously shaping the aerosol distribution and associated significant hydroclimate (precipitation, cloudiness, surface shortwave radiation, 2-m air temperature) over the Indo-Gangetic Plain. The above findings can be interpreted as manifestation of the aerosol “semi-direct” effect if one is not mindful of the prevailing circulation anomalies and their concurrent impact on aerosol and hydroclimate. The complex interplay among aerosols, dynamics and precipitation also shows the challenge of extracting the aerosol impact from an observational analysis. Finally, the analysis points to the pitfalls of a columnar, circulation-blind framework in investigating aerosol-monsoon interactions, a concern of relevance in analyses of the impact of long-term aerosol trends, as well. JF - Atmospheric Research SN - 01698095 TI - Absorbing aerosols and pre-summer monsoon hydroclimate variability over the Indian subcontinent: The challenge in investigating links KW - india KW - monsoon KW - rain KW - soot AU - Bollasina, Massimo AU - Nigam, Sumant PY - 2009/06/26/ UR - http://dx.doi.org/10.1016/j.atmosres.2009.06.008 ER -