permafrost? arctic change · 2020. 10. 7. · ipcc (intergovernmental panel on climate change)...
TRANSCRIPT
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Permafrost? Arctic Change
Bob Hollister (GVSU Biology)
Arctic Ecology Program www.gvsu.edu/aep
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Importance of the Arctic
Observed Change
My Research
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IPCC (Intergovernmental Panel on Climate Change) 2001.
Climate Change 2001: The Scientific Basis
-1 0 1 2 3 4 5 6 8 10 12 oC
Predicted ANNUAL Temperature Increase in 210090N
60
30
0
30
60
90S180 120W 60W 0 60E 120E 180
Why?Warming
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IPCC (Intergovernmental Panel on Climate Change) 2001.
Climate Change 2001: The Scientific Basis
-1 0 1 2 3 4 5 6 8 10 12 oC
Predicted ANNUAL Temperature Increase in 210090N
60
30
0
30
60
90S180 120W 60W 0 60E 120E 180
Why?Warming
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Sea Ice (end of the summer)
Fourth National Climate Assessment 2018
Observed Change
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Safety on the Ice for local traditions?
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US National Climate Assessment 2014
Ice Loss from Greenland & Antarctica
Observed Change
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Which do you expect to melt faster?
Thin glacierThick glacier
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Greenland Ice Flows
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Glacier
Moraine
Thin Glacier
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Glacier
Moraine
Thick Glacier
warm salty
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Glacier
Moraine
Thick Glacier
warm salty
Rapid Melting
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Rapid Retreat
Jacobshavns Isbrae
Greenland
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Russel Huff, Univ. of
Colorado
below sea level
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West
Ant.
East
Ant.
Mostly below sea level
Antarctica
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0 20 40 60 80
Meters of Sea Level
Antarctica
Greenland
Glaciers/IceCaps
Sea Level Equivalent
East West
Sea Level Equivalent of Ice Sheets
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Land lost by 1m rise in Sea Level
Source: CReSIS and NASA
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Permafrost – frozen ground
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Distribution of PermafrostDistribution of Permafrost
Projected loss of 60-90% by 2100
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Drunken Forest
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Anisimov & Reneva (2006) Ambio:35:169-175
Damaged Buildings
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Loss of Lakes and Ponds In Alaska
Copper River Basin 1985 Copper River Basin 1995
Observed Change
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Importance of the Arctic
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Simplified Energy Movement
Hot
Cold
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NCADAC v. 11 Jan 2013
“Polar Vortex”
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Albedo
Positive Feed Back 1:Less snow → Warmer → Less snow
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Positive Feed Back 2:Taller plants → Warmer → Taller plants
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C.E. Tweedie
Carbon Release
Positive Feed Back 3:Carbon release→ Warmer → Carbon release
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My Research
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Latitude
1oC ~ 150 km
2oF ~ 100 miles
Tundra ?
Current biomes Future biomes
Climate Warming
Vegetation Change
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Plant Measures
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No.
of F
low
ers
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No.
of F
low
ers
Day of the Year
Cassiope tetragona Utqiaġvik
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No.
of F
low
ers
Day of the Year
Warmed
Cassiope tetragona Utqiaġvik
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Infl
ore
scen
ce L
en
gth
(cm
)
Plant size (Carex aquatilis)
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Annual Heat Sums (Thawing Degree Days)
Infl
ore
scen
ce L
en
gth
(cm
)
Plant size (Carex aquatilis)
Each point is a year(at a site in a treatment)
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Annual Heat Sums (Thawing Degree Days)
Infl
ore
scen
ce L
en
gth
(cm
)
Plant size (Carex aquatilis)
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Annual Heat Sums (Thawing Degree Days)
Infl
ore
scen
ce L
en
gth
(cm
)
Plant size (Carex aquatilis)
Warmed
Open
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Community composition
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Utqiaġvik Dry Site
Ambient (control plots)
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Utqiaġvik Dry Site
WarmedAmbient (control plots) (experimental plots)
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Utqiaġvik Dry Site
WarmedAmbient (control plots) (experimental plots)
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Visit www.gvsu.edu/aep
/itex
SummaryChanges Occurring
3 Feedbacks
Global Implications
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People that made this work possible
Hana Christoffersen
Katlyn Betway
Jake Harris
Tim Botting
Jessica Gregory
Robert Barrett
Jeremy May
Jenny Liebig
Steve Rewa
Brian Noyle
Lisa Walker
Robert Hollister
PIs (Current & Retired):Robert Hollister (GVSU)
Steve Oberbauer (FIU)
Craig Tweedie (UTEP)
Jeff Welker (UAA)
Patrick Webber
Fritz Nelson
Marilyn Walker
Undergraduate Field Assistants (at GVSU & MSU):Nicole Foy
Nathan Gimby
Hana Christoffersen
Kailey Keenan-Whittemore
Ellen Audia
Caleb Krueger
Katlyn Betway
Jacob Rumschlag
Kelsey Mannard
Shelia Wald
Ashley Brecken
Amanda Hennells
Michaela Clingaman
AJ Smith
Chase Baldwin
Kelsey Kremers
Tim Botting
Julein Nadeau
Jenny Liebig
Jean Galang
Jeremy May
Michael Lothschutz
Robert Slider
Amanda Synder
Dustin Bronson
Jean Van Dalen
Andrew Johnson
Amy Wren
Devan Berry
Christin Kolarchick
Josh Picotte
Meghan Yurenka
Christine Jimenez
Frank Lepera
Brandon Baker
Elise Poole
Kathryn Wilkinson
Christie Klimas
Mary Grace Villanueva
Theresa Thomas
Anna Noson
David Conlin
Lisa Koch
Bennett Weinstein
Ian Ramjohn
Graduate Students (at GVSU & MSU):
Arctic Ecology Program
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Greening TrendObserved Change
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• Carbon flux
Ecosystem Measurements
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• Carbon flux
Ecosystem Measurements Utqiaġvik Dry Site
(Net Ecosystem Exchange)
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• Carbon flux
Ecosystem Measurements Utqiaġvik Dry Site
(Net Ecosystem Exchange)
Warmed
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• Carbon flux
Ecosystem Measurements Utqiaġvik Dry Site
(Net Ecosystem Exchange)
Warmed
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• Carbon flux
Ecosystem Measurements Utqiaġvik Dry Site
(Net Ecosystem Exchange)
WarmedSwitches to a CO2 Source
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• Carbon flux
Ecosystem Measurements Utqiaġvik Dry Site
(Net Ecosystem Exchange)
?
WarmedSwitches to a CO2 Source