Publication Abstracts

Anderson et al. 2008

Anderson, B.T., A.C. Ruane, J.O. Roads, M. Kanamitsu, and G. Salvucci, 2008: A new metric for estimating local moisture cycling and its influence upon seasonal precipitation rates. J. Hydrometeorol., 9, 576-588, doi:10.1175/2007JHM968.1.

The objective of this paper is to introduce a diagnostic metric — termed the local-convergence ratio — that can be used to quantify the contribution of evaporation (and transpiration) to the atmospheric hydrologic cycle, and precipitation in particular, over a given region. Previous research into regional moisture (or precipitation) recycling has produced numerous methods for estimating the contributions of "local" (i.e., evaporated) moisture to climatological precipitation and its variations. In general, these metrics quantify the evaporative contribution to the mass of precipitable water within an atmospheric column by comparing the vertically integrated atmospheric fluxes of moisture across a region with the fluxes via evaporation. Here a new metric is proposed, based on the atmospheric moisture tendency equation, which quantifies the evaporative contribution to the rate of precipitation by comparing evaporative convergence into the column with large-scale moisture-flux convergence. Using self-consistent, model-derived estimates of the moisture-flux fields and the atmospheric moisture tendency terms, the authors compare estimates of the flux-based moisture-recycling ratio with the newly introduced local-convergence ratio. Differences between the two ratios indicate that they can be considered complementary, but independent, descriptors of the atmospheric hydroclimatology for a given region.

Export citation: [ BibTeX ] [ RIS ]

BibTeX Citation

@article{an09000a,
  author={Anderson, B. T. and Ruane, A. C. and Roads, J. O. and Kanamitsu, M. and Salvucci, G.},
  title={A new metric for estimating local moisture cycling and its influence upon seasonal precipitation rates},
  year={2008},
  journal={J. Hydrometeorol.},
  volume={9},
  pages={576--588},
  doi={10.1175%2F2007JHM968.1},
}

[ Close ]

RIS Citation

TY  - JOUR
ID  - an09000a
AU  - Anderson, B. T.
AU  - Ruane, A. C.
AU  - Roads, J. O.
AU  - Kanamitsu, M.
AU  - Salvucci, G.
PY  - 2008
TI  - A new metric for estimating local moisture cycling and its influence upon seasonal precipitation rates
JA  - J. Hydrometeorol.
VL  - 9
SP  - 576
EP  - 588
DO  - 10.1175%2F2007JHM968.1
ER  -

[ Close ]

• Return to 2008 Publications

• Return to Publications Homepage