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Posted: 2/14/2022

Airborne and Satellite Investigation of Asian Air Quality (ROSES 2022)

The  Tropospheric  Composition  Program  (TCP)  studies  the composition of  the lower atmosphere with a particular  emphasis  on  the  impact of  tropospheric  ozone and aerosols  on  air  quality  and climate  from  local  to global  scales.  This  includes  the  need to understand the  precursor  emissions,  chemical  transformations,  and  meteorological factors  that  influence  their  formation  and atmospheric  distributions.  Working  in concert with international  partners,  TCP  strives  to develop  an integrated  observing  system  for tropospheric  composition,  which includes  chemical  transport  models,  as  well  as satellite,  airborne,  and ground-based observations  of  tropospheric  composition.  This integrated  observing  system  is  fundamental  to create a  better  understanding  of  air quality  and climate. 

The composition  of  the  atmosphere is  one  of  the  most  rapidly  changing  components  of the Earth system.  As  such,  it  often  provides  the  first  clues  to  changes  in human activity and  ecosystem  responses  that  can have both  immediate and long-term  impacts. Many of  these impacts  can be categorized into short-term  issues  related to  Air  Quality  and long-term  effects  of  Climate Change.  Air  Quality  is  largely  driven by  local  factors, but it is  not  immune  to  large-scale impacts  related to transboundary  pollution transport between neighboring  countries  and the collective impact  of  human  activity  on changes in hemispheric  and global  background concentrations  of  key  pollutants.  Climate Change relates  to global-scale  trends  in  long-lived greenhouse gases,  but  the driving  emissions are highly  variable in time  and  space,  requiring  attention  at  local-to-regional  scales. Both involve outcomes  that  depend on the intersection  of  anthropogenic  and natural emissions. 

Along  with the availability  of  the  first  satellite  observations  for  atmospheric  chemical constituents  came  efforts  to diagnose  emissions.  Over  the last  two decades, increasingly  sophisticated top-down emission  assessment  methods  based on  satellite observations  have been developed to compare with traditional  bottom-up emissions assessments.  Such bottom-up emissions  are more detailed,  but  they  rely  on assumptions  in  order  to scale  up  each  emissions  sector  using  statistics  on  activity levels and average  emission factors  for  specific  processes.  Observation-based,  top-down efforts  have typically  focused  on individual  species  (e.g.,  CO,  NO CO 2R R 2R R , SO 4R R 3R R 2R R ,  NH ,  CH , )  and have provided insight  on long-term  emission trends.  With  the introduction of geostationary  satellite  observations,  additional  insight  into  diurnal  variability  in emissions  is  expected.  Deducing  these  finer-scale emission  patterns  and  the resulting atmospheric  pollutant  distributions  will  lead to a  better  understanding  of  local  and regional  air  quality  issues,  improved modeling  of  the relationship between primary emissions  and secondary  pollutants  (e.g.,  ozone  and  particulate  matter),  and  more informed decision making  to  support  pollution mitigation  strategies. 

The  NASA  Tropospheric  Composition  Program  (TCP)  is  soliciting  proposals  for participation in  the  Airborne and  Satellite Investigation of  Asian  Air  Quality  (ASIA-AQ) airborne campaign to  be conducted  in  at  least  three  Asian  locations  during  January  - March  of  2024.  This  solicitation is  looking  for  scientists  to provide  measurements  and modeling  to support  the  instrumented  NASA  research  aircraft  required to accomplish the  ASIA-AQ  research goals.  In this  airborne campaign,  the  NASA  DC-8  will provide observations  from  near  surface to  ~12.5  km,  and the NASA  GV  will  provide mapping remote sensing  observations  from  ~8.5  km.  Salient  details  of  the ASIA-AQ  campaign are summarized below.  For  a  more  detailed  description  of  the  effort,  proposers  are referred to the ASIA-AQ  white paper  available at 28TU aq/content/ASIA-AQ_White_Paper U28T https://espo.nasa.gov/asia.


  • Notice of Intent: Sep 1, 2022
  • Proposal: Oct 4, 2022
Funding Type