noaa-insect-12443
Alaska Holocene Midge Data and July Temperature Reconstructions
Clegg, B.F.; Kelly, R.F.; Clarke, G.H.; Walker, I.R.; Hu, F.S.
Alaska Holocene Midge Data and July Temperature Reconstructions
2012-02-04
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12443
Investigator
B.F.
Clegg
Investigator
R.F.
Kelly
Investigator
G.H.
Clarke
Investigator
I.R.
Walker
Investigator
F.S.
Hu
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
age at sample end,null,null,calendar year before present,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Cryptochironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Glyptotendipes sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Phaenopsectra flavipes type
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Procladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Zalutschia type A
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Limnophyes sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Psectrocladius septentrionalis
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Stempellinella/Zavrelia indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Tanytarsina indet.
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
surface air temperature,midge assemblage,null,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,regression analysis,N,WA-PLS2
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Chironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Corynocera ambigua
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Endochironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Parametriocnemus/Paraphaenocladius indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Paratendipes sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Pentaneurini indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Cladopelma sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Corynoneura/Thienemanniella indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Eukiefferiella/Tvetenia indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Labrundinia sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Parachironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Parakiefferiella triquetra
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Polypedilum sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Psectrocladius sordidellus type
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Smittia/Pseudosmittia indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Chaoboridae indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Cricotopus/Orthocladius indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Derotanypus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Einfeldia sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Lauterborniella/Zavreliella indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Metriocnemus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Microtendipes sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Monodiamesa sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Parakiefferiella sp. B
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Pseudochironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Stempellina sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Paraclaius sp.
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
depth at sample end,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Lasiodiamesa sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Orthocladinae sp. 2
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Stictochironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Ceratopogonidae indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Chaeoborus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Corynocera oliveri
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Dicrotendipes sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Heterotrissocladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Micropsectra sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Sergentia coracina type
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Allo-/Mesopsectrocladius indet.
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
surface air temperature,midge assemblage,one standard error,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,regression analysis,N,WA-PLS2; sample-specific standard error of prediction
earth science
paleoclimate
climate reconstructions|insect|paleolimnology
depth at sample start,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Cladotanytarsus mancus type
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Cryptotendipes sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Doithrix/Pseudorthocladius indet.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,indeterminate headcapsule
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Monopsectrocladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Nanocladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Pagastiella sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Parakiefferiella nigra
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,count,null,insect|paleolimnology,raw,null,N,Synorthocladius sp.
earth science
paleoclimate
insecta
population abundance
geoscientificInformation
Air Temperature Reconstruction
Arctic Oscillation (AO)
Milankovitch
13506 cal yr BP
-54 cal yr BP
Complete
60.7167
66.0667
-150.8
-145.4
Continent
North America
United States Of America
Alaska
Hudson Lake Alaska>LATITUDE 61.9>LONGITUDE -145.6833
Continent
North America
United States Of America
Alaska
Screaming Lynx Lake>LATITUDE 66.0667>LONGITUDE -145.4
Continent
North America
United States Of America
Alaska
Rainbow Lake Alaska>LATITUDE 60.7167>LONGITUDE -150.8
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Clegg, B.F., R. Kelly, G.H. Clarke, I.R. Walker, and F.S. Hu. 2011.
Nonlinear response of summer temperature to Holocene insolation
forcing in Alaska.
Proceedings of the National Academy of Sciences (PNAS),
Vol. 108, No. 48, pp. 19299-19304, 29 November 2011.
doi:10.1073/pnas.1110913108
Regional climate responses to large-scale forcings, such as precessional
changes in solar irradiation and increases in anthropogenic greenhouse
gases, may be nonlinear as a result of complex interactions among earth
system components. Such nonlinear behaviors constitute a major source
of climate "surprises" with important socioeconomic and ecological
implications. Paleorecords are key for elucidating patterns
and mechanisms of nonlinear responses to radiative forcing,
but their utility has been greatly limited by the paucity of
quantitative temperature reconstructions. Here we present Holocene
July temperature reconstructions on the basis of midge analysis
of sediment cores from three Alaskan lakes. Results show that summer
temperatures during 10,000-5,500 calibrated years (cal) B.P. were
generally lower than modern and that peak summer temperatures around
5,000 were followed by a decreasing trend toward the present.
These patterns stand in stark contrast with the trend of precessional
insolation, which decreased by ~10% from 10,000 y ago to the present.
Cool summers before 5,500 cal B.P. coincided with extensive summer ice
cover in the western Arctic Ocean, persistence of a positive phase
of the Arctic Oscillation, predominantly La Niña-like conditions,
and variation in the position of the Alaskan treeline. These results
illustrate nonlinear responses of summer temperatures to Holocene
insolation radiative forcing in the Alaskan sub-Arctic, possibly
because of state changes in the Arctic Oscillation and El Niño-Southern
Oscillation and associated land-atmosphere-ocean feedbacks.
STUDY NOTES: Holocene midge data and midge-inferred july temperatures from 3 lakes
in Alaska, USA. Chironomid data are expressed as raw headcapsule counts.
Taxonomy follows Barley et al. (2006).
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/insecta/chironomidae/northamerica/usa/alaska/alaska2011midge-t.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/insecta/chironomidae/northamerica/usa/alaska/alaska2011midge-t.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11