Journal of Paleolimnology

, Volume 41, Issue 2, pp 349–368

Development of a chironomid-based air temperature inference model for the central Canadian Arctic

Original Paper

DOI: 10.1007/s10933-008-9233-3

Cite this article as:
Porinchu, D., Rolland, N. & Moser, K. J Paleolimnol (2009) 41: 349. doi:10.1007/s10933-008-9233-3

Abstract

Subfossil midge remains were identified in surface sediment recovered from 88 lakes in the central Canadian Arctic. These lakes spanned five vegetation zones, with the southern-most lakes located in boreal forest and the northern-most lakes located in mid-Arctic tundra. The lakes in the calibration are characterized by ranges in depth, summer surface-water temperature (SSWT), average July air temperature (AJAT) and pH of 15.5 m, 10.60°C, 8.40°C and 3.69, respectively. Redundancy analysis (RDA) indicated that maximum depth, pH, AJAT, total nitrogen-unfiltered (TN-UF), Cl and Al capture a large and statistically significant fraction of the overall variance in the midge data. Inference models relating midge abundances and AJAT were developed using different approaches including: weighted averaging (WA), weighted averaging-partial least squares (WA-PLS) and partial least squares (PLS). A chironomid-based inference model, based on a two-component WA-PLS approach, provided robust performance statistics with a high coefficient of determination (r2 = 0.77) and low root mean square error of prediction (RMSEP = 1.03°C) and low maximum bias. The use of a high-resolution gridded climate data set facilitated the development of the midge-based inference model for AJAT in a region with a paucity of meteorological stations and where previously only the development of a SSWT inference model was possible.

Keywords

PaleolimnologyChironomidsInference modelAir temperatureTransfer functionArcticPaleoclimateMidgesClimate change

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • David Porinchu
    • 1
  • Nicolas Rolland
    • 1
  • Katrina Moser
    • 2
  1. 1.Department of GeographyThe Ohio State UniversityColumbusUSA
  2. 2.Department of Geography, Social Science BuildingUniversity of Western OntarioLondonCanada