CARIBIC greenhouse gases and non-methane hydrocarbons Carl - - PowerPoint PPT Presentation

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CARIBIC greenhouse gases and non-methane hydrocarbons Carl - - PowerPoint PPT Presentation

Feb 18, 2024 266 likes •499 views

CARIBIC greenhouse gases and non-methane hydrocarbons Carl Brenninkmeijer, Tanja Schuck, and Angela Baker 10 feet wide, 1.6 ton (0.4378260 % tow) Flight hours: 2,289 h Flight distance: 2,012,595 km CARIBIC destinations and flight trajectories Air

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CARIBIC

greenhouse gases and non-methane hydrocarbons

Carl Brenninkmeijer, Tanja Schuck, and Angela Baker

10 feet wide, 1.6 ton (0.4378260 % tow)

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CARIBIC destinations and flight trajectories Flight hours: 2,289 h Flight distance: 2,012,595 km

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Air Sample Statistics

Pressure altitude 10,999 meter or 36,085 feet Based on 3764 samples

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A flight from Frankfurt to Cape Town

Meteo calculations by Peter van Velthoven KNMI

5 days J e t s t r e a m ITCZ Red = low altitude africa

Mauna Loa

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Frankfurt Cape Town

Tropopause Stratosphere About 11 kilometer

Troposphere

Air samples taken

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Stratosphere or Troposphere or both ?

Applying potential vorticity from the ECMWF model or information from GHG analysis (N2 O) shows that 1138 out of 2628 samples (May 2011) were non‐tropospheric (43 %) 45 % > 1.0 PVU 38 % > 1.5 PVU 29 % > 3.0 PVU 26 % > 3.5 PVU This is for continuous data for all flights 45 % > 1.0 PVU 38 % > 1.5 PVU 29 % > 3.0 PVU 26 % > 3.5 PVU This is for continuous data for all flights 55 % undisturbed free troposphere 26 % stratosphere Balance of 19 % tropopause layer 55 % undisturbed free troposphere 26 % stratosphere Balance of 19 % tropopause layer

Meteorological analyses using ECMWF Peter van Velthoven. KNMI, de Bilt, the Netherlands

Caracas Frankfurt Vancouver Frankfurt

CARIBIC flight 380 on 7‐8 March 2012 CARIBIC flight 386 on 25‐26 April 2012

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CARIBIC Air Sample Collection

28 @ 2.5 liter glass flasks since 2005 Additional 88 stainless steel 1 liter flasks since 2010

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N2 O above the Tropopause

Using the yardstick of Andreas Zahn

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The Indian Summer Monsoon Methane Plume

Schuck et al. ACP 2010

Background: MLO (at 190N) monthly averages for 2008. The gradient is derived from CARIBIC October data

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CARIBIC - ACTM comparison

1850 1800 CH4 [ppb] 50 40 30 20 10 latitude 1850 1800 CH4 [ppb] 1850 1800 CH4 [ppb] 1850 1800 CH4 [ppb] 1850 1800 CH4 [ppb] India China BOG/CCS GRU/SCL Africa

1850 1800 CH4 [ppb] 40 20

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latitude 1850 1800 CH4 [ppb] 1850 1800 CH4 [ppb] 1850 1800 CH4 [ppb] 1850 1800 CH4 [ppb]

India China BOG/CCS GRU/SCL Africa

Tanja Schuck and Kentaro Ishijima

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Different Regions in Tropical Asia

South China Sea South East China Western Pacific India

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Methane Seasonality over Asia

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Methane Seasonality over Asia

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Monsoon‐related ‐ biogenic ‐ methane emissions

CH4 CH4 CO Ethane

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Calculations by Armin Rauthe‐Schöch using Flexpart (Andreas Stohl)

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  • ∆CH4

/∆CO: emissions

  • ~31 Tg CH4

, ~21 Tg “extra”

  • ∆CH4

/∆C2 H6 : biogenic fraction

  • Up to 75% biogenic

Angela Baker GRL in press

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N O A A ‐ E S R L , t h a n k y

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f

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y

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r s u p p

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t

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e r a l l t h e s e y e a r s Acknowledgements go to all CARIBIC partners, please consult www.caribic‐atmospheric.com

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PTRMS (OVOCs)

2H & 18O

water‐ isotopes CO O2 CO2

NO NO2 NOy

CH4 & CO2

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2x Hg H2 O 3x DOAS SO2 , BrO, HONO

OPC 3x CPCs, aerosol impactor power power computer Front View

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88 air samples (metal) 14 air samples (glass)

calibration gases

NO NO2 NOy

pumps pumps

14 air samples (glass)

DDB Rear View

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