MC2 Simulation of Blue Mtns Ecoregion,...
Transcript of MC2 Simulation of Blue Mtns Ecoregion,...
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MC2 Simulation of Blue Mtns Ecoregion, ORJohn Kim
USFS Pacific Northwest Research Station & WWETAC
David ConklinCommon Futures, LLC
Becky KernsUSFS Pacific Northwest Research Station
Jessica HalofskyUniversity of Washington
G. Stephen (Bear) PittsOregon State University
Ray DrapekUSFS Pacific Northwest Research Station
Michelle DayOregon State University
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MC2 Dynamic Vegetation Model
Biogeochemistry
Biogeography Fire
MAPSS biogeography
MonthlyTime step
Clim
ate
Soils
Elev
atio
n
Hyd
rolo
gyC
arb
on
Veg
etat
ion
Fire
Simulates biogeochem. response of plant func. types to climate change
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-5% 0% 5% 10% 15% 20%
ΔT
(°C
)
ΔP
Blue Mtns Ecoregion Future ScenariosHistorical Average (1979-2008) to Future Average (2071-2100)
ΔT v. ΔP
“Wet”: NORESM1-M RCP8.5
“Hot”: HADGEM2-ES RCP8.5
“Reference”: CSIRO-MK360 RCP8.5
“Cool”: MRI-CGCM3 RCP8.5
GCM data were
selected to
capture range of
variability among
GCM’s;
downscaled to
30 arcsec (800m)
for the Blues.
ΔT ΔP
HAD 3.0°C (5.5°F) -1%
CSI 2.6°C (4.7°F) 2%
NOR 2.3°C (4.1°F) 19%
MRI 1.4°C (2.6°F) 2%
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T (°
C)
Year
Blue Mtns Ecoregion: Temperature Projections
HADGEM2-ES RCP8.5
CSIRO-MK360 RCP8.5
NORESM1-M RCP8.5
MRI-CGCM3 RCP8.5
Historical
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DJF MAM JJA SON
Pre
cip
itat
ion
(m
m)
Season
Projected Average Seasonal PrecipitationBlue Mountain Ecoregion, 2071-2100
HADGEM2-ES RCP8.5
CSIRO-MK360 RCP8.5
NORESM1-M RCP8.5
MRI-CGCM3 RCP8.5
Historical (1979-2008)
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NP
P (
gC m
-2 y
r-1
)
Year
NPP
Historical
MRI-CGCM3 RCP8.5
CSIRO-MK360 RCP8.5
HADGEM2-ES RCP8.5
NORESM1-M RCP8.5
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Fore
st C
arb
on
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m-2
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Forest Carbon
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# Fi
res
Sim
ula
ted
(yr
-1)
Year
Fire Activity
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Historical (1979-2008)
CSIRO-MK360RCP8.5 (2071-2100)
“Reference”
I-84 Highway
National Forest
City (clockwise from top: Pendleton, La Grande, Baker City Bend, Prineville)
State Boundary
Subalpine forestCool, moist forestDry forestPonderosa pine, xericWoodlandShrublandHot dry shrublandC3 grasslandC3/C4 grassland
MC2 Vegetation Type
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HADMGEM2-ESRCP8.5 (2071-2100)
“Hot”
Historical (1979-2008)
Subalpine forestCool, moist forestDry forestPonderosa pine, xericWoodlandShrublandHot dry shrublandC3 grasslandC3/C4 grassland
MC2 Vegetation Type
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MRI-CGCM3RCP8.5 (2071-2100)
“Cool”
Historical (1979-2008)
Subalpine forestCool, moist forestDry forestPonderosa pine, xericWoodlandShrublandHot dry shrublandC3 grasslandC3/C4 grassland
MC2 Vegetation Type
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NORESM1-MRCP8.5 (2071-2100)
“Wet”
Historical (1979-2008)
Subalpine forestCool, moist forestDry forestPonderosa pine, xericWoodlandShrublandHot dry shrublandC3 grasslandC3/C4 grassland
MC2 Vegetation Type
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No. of Projections Resulting in Vegetation Type ShiftHistorical (1979-2008) to Future (2071-2100)
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
HISTORICAL
MRI-CGCM3
NORESM1-M
CSIRO-MK360
HADGEM2-ES
Proportion of Ecoregion
Clim
ate
Pro
ject
ion
(R
CP
8.5
)
Bluebunch wheatgrass - Sandberg bluegrass
Bluebunch wheatgrass - Sandberg bluegrass
Salt desert shrub, upland
Wyoming big sagebrush, without juniper
Wyoming big sagebrush, with juniper
Ponderosa pine xeric
Douglas-fir dry
Grand fir, cool, moist
Subalpine fir, cold/dry
Veg Type Shift Historical (1979-2008) to Future (2071-2100)
“Hot”
“Cool”
grassland shrubland forest
grassland shrubland forest
C3/C4 grassland
C3 grassland
Hot dry shrubland
Shrubland
Woodland
Ponderosa pine, xeric
Dry forest
Cool, moist forest
Subalpine forest
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Change in Total Veg Carbon, 1979-2008 to 2071-2100
“Reference Warming Scenario”: CSIRO-MK360
RCP8.5
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Summary
• Under RCP8.5 scenario, climate will be hotter & wetter.
• Wetter winters. Hotter & drier summers.
• Vegetation simulations suggest:– Loss of subalpine forests are likely
– Forests vulnerable to conversion to woodlands & shrublands
– Conversion of shrublands to hot shrublands, expansion of grasslands
– Higher productivity + incr. fire => lower carbon stocks
– Stable forests still lose carbon stocks
Acknowledgements: Ayn Shlisky, Becky Gravenmier, Karen Bennet-Jones (USFS R6); MyricaMcCune, Chris Ringo (OSU); Phil Mote, David Rupp (OCCRI/OSU); Dominique Bachelet, Ken Ferschweiler, Tim Sheehan (CBI); Miles Hemstrom (INR); Ron Neilson, Jim Lenihan (USFS, retired).