biomass burning in southeast asia: science questions and proposed study approaches
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Biomass Burning in Southeast Asia: Science questions and proposed study approaches Bob Yokelson, University of Montana - PowerPoint PPT PresentationTRANSCRIPT
Biomass Burning in Southeast Asia: Science questions and proposed study approaches
Bob Yokelson, University of Montana
Thanks to: S. Akagi, P. Artaxo, D. Blake, I. Burling, P. Buseck, T. Campos, T. Christian, T. Clarke, H. Coe, J. Craven, J. Crounse, P. DeCarlo, J. de Gouw, A. Fried, J. Gilman, D.
Griffith, A. Guenther, P. Hobbs, R. Holzinger, J. Jimenez, T. Karl, W. Kuster, S. Kreidenweis, A. Laskin, L. Mauldin, G. McMeeking, J. Reid, J. Roberts, J. Seinfeld, I.
Simpson, C. Stockwell, J. Taylor, P. Veres, C. Warneke, A. Weinheimer, P. Wennberg, C. Wiedinmyer, and many others, plus NSF, DoD, JFSP, USFS, DOE, NASA, EPA,+
SEAC4RS Science Team Meeting
Feb 23, 2012, Boulder, CO
Global Emissions Tg per year
Source Total C gas-phase NMOC Primary PM VOC SVOC BC OC
FF (Total) 7000 200 3 2
BB (Total) 4600 (6300) 200 (365) 200 (365) 5 (5.7) 32 (53)savanna 1600cooking 1500forest 1000crop 500peat El-Nino 1700 165 165 .68 21
Biogenic 1000 800 200
Sources: Bond et al 2004, Forster et al 2007, Akagi et al., 2011.
Fires are a huge source and atmospheric chemistry is done by putting initial emissions in a chemical transport model.We have problems with SE Asia:1. There have never been any emissions measurements
on real fires in SE Asia. In a recent lab experiment with organic soils (NOAA, Stockwell), ~28% of C emitted as NMOC, normally 1-2 % for other types of BB (DC8 package).
Heritage: NASA/NSF Missions Have Produced Bulk of EF.SCAR-B/LBA-TROFFE BrazilSAFARI 2000 AfricaMILAGRO Mexico-NH TropicsARCTAS Boreal ForestSEAC4RS SE Asia?
2. There have never been any SE Asia plume aging measurements AND aging is extremely fast and variable.
3. Clouds and smoke are two of the largest and least understood climate forcers on Earth and they are intimately mixed in SE Asia. Smoke impacts on clouds are exceedingly complex. There are almost no data on the impact of clouds on smoke chemistry.
What we might see in SEAC4RS
In addition to completing the “big three of biomass burning” we have an opportunity to learn how smoke plumes evolve. Based on limited available evidence, the evolution of aerosols and ozone in biomass burning plumes seems to differ in “warm-wet” vs “cool-dry” plumes and mixing may spur rapid evolution.
MILAGRO: Warm-wet plume (Yokelson et al., 2009)
0.0 0.5 1.0 1.5 2.00.00
2.00
4.00
6.00
8.00
10.00
12.00
1.4
1.6
1.8
2.0
2.2
2.4
OA/CO
OA/OC
Time since emission (h)
DOA/DCO (ma
ss)
DO
A/D
OC
(m
ass)
DeCarlo, Jimenez, Campos, data
Cool-dry plume (Akagi et al., 2012)
Craven, Seinfeld, data
MILAGRO: Warm-wet plume (Yokelson et al., 2009)
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 20.70
0.75
0.80
0.85
0.90
0.95
1.00
Time since emission (h)
Sing
le S
catte
ring
Alb
edo
Clarke, Shinozuka, data
0 1 2 3 4 50.4
0.45
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
Time since emission (h)
Frac
tion
"thi
ckly
coa
ted"
BC
Taylor, McMeeking, Coe, data
Cool-dry plume (Akagi et al., 2012)
Warm-wet versus cool-dry: Ozone production
0 1 2 3 4 50.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40Akagi et al 2012
Linear (Akagi et al 2012)
Initial O3
Yokelson et al 2009
Time since emission (h)
ΔO
3/Δ
CO
Weinheimer, Campos, data
Cool-moist mixing with urban: Ozone production
FF/BB mix also in:ARCTAS-CARBLee et al.: 2008
0 1 2 3 4 5
-0.20
0.00
0.20
0.40
0.60
0.80
1.00
Akagi et al 2012
Linear (Akagi et al 2012)
Initial O3
Yokelson et al 2009
South Carolina Prelim
Time since emission (h)
ΔO
3/Δ
CO
Condition or Metric
cool-dry warm-wet SC SEAC4RS
Water % 0.2 1.9 0.6 1.8-2.8
Solar Zenith
50 20 50 15-20
OH 5E6 1E7 TBD ?
Temp 12-15 15-20 10-14 25-35
Mixing w/other
N N Y we think Y often
OA/POA .8 (4 h) 2.6 (1.4 h) TBD ?
DO3/DCO 0.1 (4 h) 0.35 (1.7 h) .3-.9 (1.7h) ?
Where will SE Asian plumes fit in this spectrum?
How do we get more info on the substantial amount of rapid initial change?
Fire are very variable within a fire AND fire to fire so be careful of this scenario…..
0.0 0.2 0.4 0.6 0.8 1.0 1.202468
101214161820
Plume 1Pume 2
Plume age in lifetimes of “X”
DX/DCO (mm
ol/mol
)Emission Ratio (ER) DX/DCO = 10 ± 8 (2s)
Lefer et al., 1994 JGR
Lifetime @ measured OHBenzene 9 d
Toluene 2 d
Ethane 47 d
Propane 11 d
Quantitative plume evolution measurements. (Akagi et al., 2012)
Species EF (g/kg burned) After 4 h agingCO2 1697.0 " CO 72.68 " MCE 0.9369 " Methane 3.67 " Ethene 0.78 0.39Propene 0.45 0.0 2Acetic Acid 1.59 5.56Formic Acid 0.06 0.69Formaldehyde 1.29 1.87 Methanol 1.59 " HCN 0.90 " Acetylene 0.11 " HONO 0.70 ~0.01NO 0.90 ~0.01NO2 2.66 ~0.1NH3 1.68 0.84PM2.5 8.61 ~6.9? Ozone 0.00 16.20PAN 0.00 2.10
Need an approach that’s practical for the DC8 and GV
The single long-axis sample “time-machine” flight plan works sometime. DC8, GV alt.
(DX/DY)I (DX/DY)F
Windspeed 10 mph Aircraft speed 250 mphCheck e.g. DBC/DCO
0 0.2 0.4 0.6 0.8 1 1.2 1.40.000
0.002
0.004
0.006
0.008
0.010
0.012
0.014
BC/COinitial value BC/COJNO2
Time since emission (h)
BC
/CO
(mg/
sm3/
ppb)
or J
NO
2 (1
/s)
STARTS1 & S2
A
B
C
S3 END OR REPEAT
Sample other targets or swap airspace
with GV if small fire for time “X”
Pseudo-lagrangian can be as simple as breaking off to another target (ships, megacities, another fire, etc) and then coming back to projected downwind location later.
F
E
D
A + X
B + X
C + X
This could work for convective outflow too!
Finding fires
Harder and easier then some may think.
Case Study from SAFARI 2000: A prescribed fire seen from the flagship NASA aircraft was not seen by MAS on ER-2 or by TERRA as a thermal anomaly.
MILAGRO: Out of 56 fires found visually – only 10 were hotspots. Orbit gaps, clouds, and timing.
However a simple strategy works. If there were hotspots today & fair weather is forecast tomorrow go look.
0 1 2 3 4 5 6 7 80
1
2
3
4
5MILAGRO Early Dry Season: 14 flights
Number fires found in ~3.5 h flight
Num
ber o
f flig
hts
YES WE CAN FIND FIRES! THAT ALLOWS ACTUAL QUANTITATIVE AGES!
Back trajectories and hot-spots method.
48 38 36 31 28 26 22 18 11 2 HOURS UPWIND
http://geonetwork4.fao.org/firemap/ or http://firefly.geog.umd.edu/firemap/ or http://lance.nasa.gov/data-products/modis-products/ & Ed Hyer
20090923 1400 LT Tagged BB-CO at 2 km Patrick Kim, Harvard
20090918 1400 LT Tagged BB-CO at 2 km Patrick Kim, Harvard
Sawa et al., 1999 GRL
FLAMBE for SEAC4RS
Edward Hyer20 February 2012
Characteristics of FLAMBE-SEAC4RSBasic Characteristics
• Spatial resolution of satellite inputs (~5km)
• Hourly temporal resolution• Latency: Incorporation of fire
observations within 6 hours• Fuels description using new LC
map from National University of Singapore– Based on 2010 observations– Includes tree plantations
• Improved trace gas partitioning information– Yokelson
Advanced Characteristics• Full coverage correction, and angular
correction of MODIS• Diurnal cycle from geostationary
observations• Tagging of fire regimes, vegetation
types• Uncertainty estimates usable for
ensemble generation• “probable fire under cloud”
combining cloud data with persistence forecast
• Forecast emissions fields based on empirical relations between weather and fire activity
Timeline of FLAMBE-SEAC4RS
• 1 May: Generation of preliminary near-real-time product, and draft documentation available
• 1 June: Reprocessing of 10/2010 to present complete (MTSAT-2 era)
• 1 July: FLAMBE-SEAC4RS finalized with feedback from modelers, final documentation released
• 21 July: October 2010-present processed with final version
• 21 September: Reprocessing from 9/2008 to 10/2010 complete (MTSAT-1R era)
Idealized search cal/val procedure: will likely have to do one dipping and one off-shore.
1000
2000
3000
4000
0 0.01 0.02 0.03 0.04 0.05 0.06Ratio of Compounds to CO
Alti
tude
(msl)
HCHOCH3OH
NH3 HAc NO2
NO
Courtesy, Paulo Artaxo
All (rare) tropical O3 formation for testing model mechanism: 2005, O3 works if NMOC increased ~3 or HONO added
-0.05
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 20 40 60 80 100Smoke Age (minutes)
Africa Timbavati Fire
Africa Beira Fire
Africa Miombo Fire
Simulated TimbavatidO3/dCO
Yucatan C-130 Fire 3
DO
3 / D
CO
-0.05
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 20 40 60 80 100Smoke Age (minutes)
Africa Timbavati Fire
Africa Beira Fire
Africa Miombo Fire
Simulated TimbavatidO3/dCO
Yucatan C-130 Fire 3
DO
3 / D
CO
Headlines
Experts predict thousands to die as smog spreadsAgence France-Presse (Paris)Sept 26, 1997HONG KONG – Thousands of people will be killed by the smog blanketing Southeast Asia, experts in Hong Kong warned yesterday, adding some regions could face famine as crops are devastated and livestock chokes to death.“It will destroy the ecology of the region,” said Fang Ming, senior climatology programme manager at Hong Kong University of Science and Technology’s research centre.“Insects, animals, and vegetation alike will be largely destroyed,” he said.