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10.1016/j.atmosenv.2020.117947 http://scihub22266oqcxt.onion/10.1016/j.atmosenv.2020.117947 32982563!7501850!32982563     free     free     free Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Atmos+Environ+(1994) 2021 ; 244 (ä): 117947 Nephropedia Template TP {{tp|p=32982563|t=2021. High rise in carbonaceous aerosols under very low anthropogenic emissions over eastern Himalaya, India: Impact of lockdown for COVID-19 outbreak |pdf=|usr=}}{{32982563}} gab.com Text High rise in carbonaceous aerosols under very low anthropogenic emissions over eastern Himalaya, India: Impact of lockdown for COVID-19 outbreak JO: Atmos Environ (1994) http://www.kidney.de/pget.php?&tw=1&pmid=32982563 #FOAvip The present study has been conducted to investigate the relative changes of carbonaceous aerosols (CA) over a high altitude Himalayan atmosphere with and without (very low) anthropogenic emissions. Measurements of atmospheric organic (OC) and elemental carbon (EC) were conducted during the lockdown period (April 2020) due to global COVID 19 outbreak and compared with the normal period (April 2019). The interesting, unexpected and surprising observation is that OC, EC and the total CA (TCA) during the lockdown (OC: 12.1 +/- 5.5 mug m(-3); EC: 2.2 +/- 1.1 mug m(-3); TCA: 21.5 +/- 10 mug m(-3)) were higher than the normal period (OC: 7.04 +/- 2.2 mug m(-3); EC: 1.9 +/- 0.7 mug m(-3); TCA: 13.2 +/- 4.1 mug m(-3)). The higher values for OC/EC ratio too was observed during the lockdown (5.7 +/- 0.9) compared to the normal period (4.2 +/- 1.1). Much higher surface O(3) during the lockdown (due to very low NO) could better promote the formation of secondary OC (SOC) through the photochemical oxidation of biogenic volatile organic compounds (BVOCs) emitted from Himalayan coniferous forest cover. SOC during the lockdown (7.6 +/- 3.5 mug m(-3)) was double of that in normal period (3.8 +/- 1.4 mug m(-3)). Regression analysis between SOC and O(3) showed that with the same amount of increase in O(3), the SOC formation increased to a larger extent when anthropogenic emissions were very low and biogenic emissions dominate (lockdown) compared to when anthropogenic emissions were high (normal). Concentration weighted trajectory (CWT) analysis showed that the anthropogenic activities over Nepal and forest fire over north-east India were the major long-distant sources of the CA over Darjeeling during the normal period. On the other hand, during lockdown, the major source regions of CA over Darjeeling were regional/local. The findings of the study indicate the immense importance of Himalayan biosphere as a major source of organic carbon. Twit Text FOAVip High rise in carbonaceous aerosols under very low anthropogenic emissions over eastern Himalaya, India: Impact of lockdown for COVID-19 outbreak ????Atmos Environ (1994) http://www.kidney.de/pget.php?&tw=1&pmid=32982563 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=32982563 #FOAvip English Wikipedia <ref>{{Cite pmid|32982563}}</ref> High rise in carbonaceous aerosols under very low anthropogenic emissions over eastern Himalaya, India: Impact of lockdown for COVID-19 outbreak #MMPMID32982563 Chatterjee A; Mukherjee S; Dutta M; Ghosh A; Ghosh SK; Roy A Atmos Environ (1994) 2021[Jan]; 244 (ä): 117947 PMID32982563show ga The present study has been conducted to investigate the relative changes of carbonaceous aerosols (CA) over a high altitude Himalayan atmosphere with and without (very low) anthropogenic emissions. Measurements of atmospheric organic (OC) and elemental carbon (EC) were conducted during the lockdown period (April 2020) due to global COVID 19 outbreak and compared with the normal period (April 2019). The interesting, unexpected and surprising observation is that OC, EC and the total CA (TCA) during the lockdown (OC: 12.1 +/- 5.5 mug m(-3); EC: 2.2 +/- 1.1 mug m(-3); TCA: 21.5 +/- 10 mug m(-3)) were higher than the normal period (OC: 7.04 +/- 2.2 mug m(-3); EC: 1.9 +/- 0.7 mug m(-3); TCA: 13.2 +/- 4.1 mug m(-3)). The higher values for OC/EC ratio too was observed during the lockdown (5.7 +/- 0.9) compared to the normal period (4.2 +/- 1.1). Much higher surface O(3) during the lockdown (due to very low NO) could better promote the formation of secondary OC (SOC) through the photochemical oxidation of biogenic volatile organic compounds (BVOCs) emitted from Himalayan coniferous forest cover. SOC during the lockdown (7.6 +/- 3.5 mug m(-3)) was double of that in normal period (3.8 +/- 1.4 mug m(-3)). Regression analysis between SOC and O(3) showed that with the same amount of increase in O(3), the SOC formation increased to a larger extent when anthropogenic emissions were very low and biogenic emissions dominate (lockdown) compared to when anthropogenic emissions were high (normal). Concentration weighted trajectory (CWT) analysis showed that the anthropogenic activities over Nepal and forest fire over north-east India were the major long-distant sources of the CA over Darjeeling during the normal period. On the other hand, during lockdown, the major source regions of CA over Darjeeling were regional/local. The findings of the study indicate the immense importance of Himalayan biosphere as a major source of organic carbon. äHigh rise in carbonaceous aerosols under very low anthropogenic emissi(epmc).pdf DeepDyve Pubget Overpricing