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Chemical and Physical Properties of Aerosols Measured Onboard the R/V Atlantis during CalNex NOAA/PMEL Atmospheric Chemistry Group Funded through the NOAA.

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Presentation on theme: "Chemical and Physical Properties of Aerosols Measured Onboard the R/V Atlantis during CalNex NOAA/PMEL Atmospheric Chemistry Group Funded through the NOAA."— Presentation transcript:

1 Chemical and Physical Properties of Aerosols Measured Onboard the R/V Atlantis during CalNex NOAA/PMEL Atmospheric Chemistry Group Funded through the NOAA Climate and Air Quality Programs

2 Data Analysis Q-AMS: chemistry DMPS-APS: aerosol number size distributions Meteorological parameters measured on the ship http://saga.pmel.noaa.gov/data/ Thermo-denuder SMPS system: changes in number size distributions heated to 230°C

3 Case Studies 1.Background marine air mass with aerosol mixed into the MBL from the FT. 2.Inland – Sacramento Ship Channel. 3.Santa Monica Bay 4.Port of Long Beach/LA

4 Case Studies 1.Background marine air mass with aerosol mixed into the MBL from the FT.

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6 Very low organic aerosol concentrations. Very acidic submicrometer sulfate aerosol (SO 4 = /NH 4 + MR <<1). Increases in sulfate mass associated with mixing from FT.

7 Accumulation mode Aitken mode 230°C Ambient T Accumulation and Aitken modes have a volatile component Seasalt number mode

8 Case Study 2 Sacramento Ship Channel June 4-6, 2010 Surface residence time plots 06/05 at 2000-2300 06/04 at 1100-1400 http://www.esrl.noaa.gov/csd/metproducts/flexpart/static_pages/atlantisimage.html Jerome Brioude

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11 Turning Basin Suisun Bay Sacramento Ship Channel

12 Ambient T 230°C Mid-day local time aerosol nucleation events Aerosol size reduced upon heating

13 Ambient T 230°C Mid-day local time aerosol nucleation events

14 Mass size distribution 3 June 2010, 1930-2330

15 Case Study 3 Santa Monica Bay #1 16 May 2010

16 Santa Monica Bay #1 Sunday, 16 May 2010, pre-dawn plume

17 Number distribution dominated by Aitken and Nuclei mode particles.

18 Santa Monica Bay #1 Sunday, 16 May 2010, pre-dawn plume

19 Santa Monica Bay #2 24 May 2010, Off the airport

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23 Case Study 4 Port of Long Beach/LA

24 S NW SE NW SE NW

25 Case Study 4 Port of Long Beach/LA

26 Case Studies 1.Background marine air mass with aerosol mixed into the MBL from the FT. 2.Inland – Sacramento Ship Channel. 3.Santa Monica Bay 4.Port of Long Beach/LA

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