C. Mark Eakin 1 , Robert B. Dunbar 2 and Julia E. Cole 3

1. Annual Records of Tropical Systems (ARTS) Windows into Past Millennia Climate researcher need high-resolution records from targeted Holocene and last-glacial intervals to understand how the climate system responded to boundary conditions substantially different from those prevailing today. Figure 1. Sites of coral records used in figures 2-3. Background colors indicate mean instrumental SST field. Pink dots indicate sites where annual coral isotope records span the interval 1895-1990; white dots indicate shorter records. For the longer records, trends are calculated over the 1895-1990 period (or 1895 to the most recent year, if before 1990) and are indicated parenthetically in °C per 100 years, assuming all isotopic variability is due solely to SST changes and the slope of the SST-d18O relationship is 0.22 °C per 1”. Site sensitivity issues (e.g. depth of coral, influence of rainfall) have not been taken into account. Large central Pacific values are almost certainly due to the influence of rainfall on seawater isotopic content (after Bradley et al. in prep., PAGES Synthesis Volume). Figure 2 (left). Summary of annual resolution coral isotope records, normalized to the 1923-1980 period (common to most records) and with a 7-year smooth (thicker line) to highlight decadal and longer variability. All show general trends towards warmer/wetter conditions (after Bradley et al. in prep., PAGES Synthesis Volume). Numbers correspond to Figure 1. a b c d Data Contribution "Full and open sharing of the full suite of global data sets, and other data sets needed for global change studies, is the primary objective of the IGBP." - IGBP Report No.12 "Make your data available without restrictions once published by contributing to an organization committed to long-term data availability." International Geosphere-Biosphere Programme Data Policy International Council of Scientific Unions Data Policy Policy on Data from Federal Grants from the Data Management Working Group (1997) Global Change Data Policy (1991) Frequently Asked Questions About Data Policy Our goal at the WDC is to make data submission easy and efficient for you, to help you preserve your data as a legacy that can be used by your colleagues today AND by future generations of scientists. The WDC has made a long term commitment to preserve your data and make it available to others. Once contributed your data will be available to others as a set of files organized by your name, date, and contribution number (accessible via the WWW, FTP, and also on diskette). Your data may also be imported into a relational database and thus accessible using database queries. Data Policy - Frequently Asked Questions: • What about a proprietary period for exclusive use? • What if I want to have my own archive or Web site? • What about the ancillary project data that I never published? • What are the Internationally-agreed up on policies for data sharing? International Geosphere-Biosphere Programme Data Policy International Council of Scientific Unions Data Policy How to contribute: Check the guidelines to make sure your data set is complete, and in a useable format. Contact us if you have questions about what to include or what formats are required. View the existing entries in the WDC for Paleoclimatology Contributions Series. • Submit your data in one of the following ways: As an email attachment FTP to the /pub directory on the WDC server Mail data as a diskette. Printed reports are also accepted. New Section: Submit your data online!! (Currently for Tree Ring Data only) • Receive your acknowledgement and Contribution Number from the Center, and review your data set to make sure everything is correct. Figure 3 (right): Analysis of spatial SST patterns using 13 time series from 12sites from Figures 1 and 2 except 1, 3, 10, 14 (2 records are used from site 16). (a) Leading spatial pattern observed in coral data (in dimensionless units); greys indicate 90% significance. (b) The time series of that pattern (degrees C). (c) As in (a) except for second spatial pattern. (d) As in (b) except for time series of second pattern. After Evans et al. (2000) Paleoceanography, 15. Annual Records of Tropical Systems (ARTS) Recommendations for Research Coral Cores Currently in the World Data Center Archive Available at: www.ngdc.noaa.gov/paleo/corals.html A PAGES/CLIVAR Initiative Edited by Robert B. Dunbar and Julia E. Cole PAGES Workshop Report, Series 99-1 NOAA National Geophysical Data Center C. Mark Eakin1, Robert B. Dunbar2 and Julia E. Cole3 1 World Data Center for Paleoclimatology, Boulder, Colorado 2 Stanford University, Stanford, California 3 The University of Arizona , Tucson, Arizona Goals The goals of the Annual Records of Tropical Systems (ARTS) program are to: 1. document and understand the behavior of the tropical ocean-atmosphere and its teleconnections, with seasonal to annual resolution, over the past several centuries; and 2. assess the stability of tropical climate systems and their teleconnections as the background climate and associated forcing phenomena change over seasons to centuries. The ARTS initiative promotes the synthesis of paleoclimate data with instrumental and modeling perspectives to address uncertainties in our understanding of tropical climate variability and its impacts. Drilling a live Porites coral, Jarvis Island The Need The climate research community needs long, continuous records of interannual to centennial variability in the tropics and of the teleconnections to the extratropics. An important target for paleoclimate reconstruction is the extension of indices of large-scale climate systems into pre-instrumental periods. Well-calibrated, multicentury reconstructions need to be integrated into spatially gridded research products that can be used to drive or test general circulation model simulations. Windows into Past Centuries Coordinated efforts are needed to analyze climate of the past several centuries. A proposed ARTS synthesis project entitled "Climate of the Nineteenth Century,” (CNC) would coordinate these efforts, including the development of records from critical locations, spatial interpolation techniques to link point reconstructions, model simulations, and model/paleodata comparison. The highest priorities for the CNC project are production of fields of sea surface temperatures (SST's) across the tropical Pacific extending back to at least 1800 AD, and examination of teleconnections within the Indian Ocean, Australasian and American regions. New sampling will be steered by analyses of available data and comparisons with modeling results. Accessing the Data This research is only possible through generous contribution of data by many coral paleoclimatologists to the World Data Center for Paleoclimatology. You can help in this and other efforts to consolidate our understanding of past climates. Contribute your data to the WDC-Paleo today at: www.ngdc.noaa.gov/paleo For more information on ARTS, contact: C. Mark Eakin, World Data Center for Paleoclimatology NOAA/NGDC, 325 Broadway, Boulder, CO 80305-3328 USA, mark.eakin@noaa.gov Robert B. Dunbar, Department of Geological and Environmental Sciences Stanford University, Stanford, CA 94305-2115 USA, dunbar@stanford.edu Julia E. Cole, Department of Geosciences The University of Arizona , Tucson, AZ 85721-0077 USA, jcole@geo.arizona.edu Next ARTS Meeting: November 4-7 2001 in Nouméa, New Caledonia Dunbar, R.B. and J.E. Cole, eds. Annual Records of Tropical Systems (ARTS): Recommendations of Research, PAGES Workshop Report Series 99-1, 1999. Report available online at: http://pangea.stanford.edu/Oceans/ARTS