Docstoc

Dust Outflow and Deposition to the Ocean

Document Sample
Dust Outflow and Deposition to the Ocean Powered By Docstoc
					     Dust Outflow and Deposition to
          the Ocean (DODO)
  Ellie Highwood (Reading)
e.j.highwood@reading.ac.uk

                 Co-Is:
Hugh Coe, David Vaughan, John Lloyd,
  Paul Williams (Manchester), Roy
       Harrison (Birmingham)
             Collaborators:
 Met Office (OBR and Hadley Centre)
           Subcontractors:
           Ally Lewis (York)
     Paola Formenti (LISA-Paris)



  NERC SOLAS Programme
                             DODO Aims
  • Case study based predictions of dust deposition to the
    NH Atlantic Ocean, constrained by in situ aircraft
    measurements
  • Describe interaction of transport processes and aerosol
    chemistry and microphyiscs
  • Fingerprint dust sources using single particle
    characterisation → composition, including iron content
  • Assess the climatological representivity of the case
    studies and predict the seasonal footprint of dust
    deposition to the north Atlantic ocean.
  • Assess the radiative impact of the dust over the Atlantic
    ocean and its effect on sea surface temperatures.


AMMA Meeting, Leeds, 07/05
                      DODO Methodology
   DABEX                    In-situ aircraft measurements of dust          AMMA
   (SOP-0)              microphysics and radiative effect, collection of
                                                                           (SOP-2)
                                       airborne samples
(Met Office
                                                                           International
experiment)                        BAe-146 Feb 06, Aug 06
                                                                           NERC/EU



  Ground based sample                                               Dust outbreak
   collection on Cape                                               modelling and
          Verde                                                     climatology
             UoB

                                    Laboratory Analysis
                                        Iron content

                                                                            Co-incident ship
                                                                            based
AMMA Meeting, Leeds, 07/05
                                                                            observations?
                             DODO fieldwork
  In situ measurements of aerosol chemical and microphysical properties
      during dust outflow events (case studies)
  Synergistic with, and adding value to, existing FAAM operations during
      DABEX and AMMA (by adding a multi-stage impactor to the LTI,
      thereby enhancing aerosol characterisation, and by adding flying
      hours)
       DODO-1 Jan-Feb 2006              DODO-2 August-September
     (extending DABEX – SOP0,           2006 (associated with AMMA
                TT7)                            SOP-2 TT8)
 FAAM: aerosol microphysics and        FAAM: chemistry and aerosol
 chemistry, radiation                  microphysical characteristics.
 UoB: single particle composition      Dust sample collection for iron
 measurements based at Cape            content analysis
 Verde site (ATOFMS)
 Dust sample collection



AMMA Meeting, Leeds, 07/05
                             DODO flights
  • Total 96 hours (40 on task hours for DABEX, up to 40
    on-task and transit hours SOP2) + transits + test flights

  • Limited detachment costs

  • DABEX/SOP-0 DODO will extend detachment and move
    detachment to Dakar for 2 weeks after DABEX

  • AMMA SOP-2 DODO will either add some hours to
    existing IOP5 (?) plans for suitcase flights to Dakar,
    some flying over ocean and then return (as envisaged by
    BAe-146 in downwind mode), or more likely extend by 5
    or so days at end and move detachment to Dakar.



AMMA Meeting, Leeds, 07/05
                             DODO/AMMA
  • Lots of extra flying hours and some
    detachment costs
  • Extend region of BAe146 activity to ocean
    west of Dakar
  • More dust and satellite intercomparison
    work
  • Extension of ground based dust to Sal


AMMA Meeting, Leeds, 07/05

				
DOCUMENT INFO
Shared By:
Categories:
Stats:
views:5
posted:4/7/2010
language:English
pages:6