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Tree-ring carbon isotope data and drought maps
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Isotope Drought Index and Ancillary Maps Maps of the Isotope Drought Index have been generated for pentads (1600-1604 through 1995-1999) and for individual years (1985 through 1999). Ancillary maps of Southwestern land-cover and land-use are also available. |
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Ancillary Maps of Southwestern Land-Cover and Land-Use |
| We have provided ancillary maps (Appendix D) for contextual assessment of the Isotope (Drought) Index maps. The ancillary maps provide details on the land cover type, individual plant functional type coverage, cropping, as well as topographic elevation, river catchment area and irrigation. The land cover map is taken from the MODIS global land cover mapping of Friedl et al. (2002). Plant functional type, cropping and bare soil mapping were taken from the MODIS Vegetation Continuous Fields data set of Hansen et al. (2003) and historical cropping data set of Ramankutty and Foley (1999) as described in Lawrence and Chase (2006). Irrigation was taken from the global UNFAO AQUASTAT Version 4.0 dataset of Siebert et al. (2006). The digital elevation and river catchment area mapping were both derived from the global USGS GTOPO30 dataset of Siebert et al. (2006). |
| 1. Land cover types |
| 2. Bare soil cover |
| 3. Broadleaf tree cover |
| 4. Needleleaf tree cover |
| 5. C3 grass cover |
| 6. C4 grass cover |
| 7. Shrub cover |
| 8. Crop cover |
| 9. Irrigation cover |
| 10. Elevation |
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11. Catchment area
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| Pentad Isotope Drought Index Maps | ||
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| Isotope Drought Index Maps Color Scale |
| Individual Year Isotope Drought Index Maps | ||
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| Contour Map | Filled Contour Map | Error Map |
| 1985 | 1985 | 1985 |
| 1986 | 1986 | 1986 |
| 1987 | 1987 | 1987 |
| 1988 | 1988 | 1988 |
| 1989 | 1989 | 1989 |
| 1990 | 1990 | 1990 |
| 1991 | 1991 | 1991 |
| 1992 | 1992 | 1992 |
| 1993 | 1993 | 1993 |
| 1994 | 1994 | 1994 |
| 1995 | 1995 | 1995 |
| 1996 | 1996 | 1996 |
| 1997 | 1997 | 1997 |
| 1998 | 1998 | 1998 |
| 1999 | 1999 | 1999 |
| 2000 | 2000 | 2000 |
| 2001 | 2001 | 2001 |
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http://www.ncdc.noaa.gov/paleo/treering/isotope/iso-droughtmaps.html Downloaded Thursday, 01-Aug-2013 14:53:17 EDT Last Updated Wednesday, 20-Aug-2008 11:24:07 EDT by paleo@noaa.gov Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments. |