Technical details concerning development of a 1200 yr proxy index for global volcanism
By T. Crowley, M. B. Unterman. 2012
305 citations recorded by the source corpus.
Abstract. This report describes details of developing a volcano forcing reconstruction (Crowley et al., 2008) for climate models that is based primarily on sulphate records in Antarctic and Greenland ice cores. The chronology of eruptions is considered accurate to within 1 yr for the interval AD 1104–2000 and about 2 yr for AD 800–1103. The reconstruction involves (1) calibration against satellite aerosol optical depth (AOD) estimates of the 1991 Pinatubo/Hudson eruptions; (2) partial validation against independent lunar estimates of AOD and global sulphate emissions; (3) partial assessment of uncertainties in AOD estimates; (4) assessment of possible tropical "false positives" in ice core reconstructions due to simultaneous occurrence of mid/high-latitude eruptions in each hemisphere; (5) identification of a new category of eruptions, termed "unipolar" tropical eruptions, in which the eruption plume penetrates mainly to polar regions in only the hemisphere of its eruption; (6) use of different growth curves for high- and low-latitude eruptions; (7) specification of 2/3 power shortwave scaling for eruptions larger than the 1991 Pinatubo eruption; (8) introduction of an estimate of effective particle size that affects lifetime and scattering properties of stratospheric aerosols; and (9) utilization of bimonthly-resolution electrical conductivity measurements to estimate the eruption date of the 1258/1259 eruption as 1257.7±0.2. The data, and a high-temporal resolution reconstruction for climate models, are available at: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:14168 .
Subfields: Atmospheric Science, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/c99791f914d6a8d2971f658dae1edc8e9ff54050
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In Atmospheric Science
- Gabriele C. Hegerl
- C. Timmreck
- A. Robock
- A. Schmidt
- Eugene V. Rozanov
- M. Marchand
- E. Gerber
- M. Mills
In Global and Planetary Change
Citations in the corpus
- The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP) : experimental design and forcing input data for CMIP6 (2016, methodology): “As instrumental observations of volcanic eruptions are limited, with the 1991 eruption of Mt. Pinatubo being the best documented event (e.g., Minnis et al., 1993), forcing characteristics must often be reconstructed based on indirect evidence such as ice-core measurements (e.g., Devine et al., 1984;”