1. Climate Data

2. Scope of Core Data Air temperature Precipitation Rain Snow Relative Humidity Barometric Pressure Solar Radiation Wind

3. Design and Status of Core Data All variables collected at two primary climate stations – LTER1, LTER2, Wetlands (site to be added) CPCRW – Variable array has a number of differences in the radiation measurements (e.g. no PAR) Select variables collected at “A” reps of the BCEF Air temperature Summer precipitation (throughfall) PAR

4. Core Data Availability QA/QC – Definition Quality Assurance (QA) is defined as a procedure or set of procedures intended to ensure that a product (climate monitoring equipment) under development (before work is complete, as opposed to afterwards) meets specified requirements. Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product adheres to a defined set of quality criteria or meets the requirements of the client or customer.

5. Core Data Availability Data that has passed QA/QC procedures LTER1 & LTER2 precipitation data “A” site precipitation data – QC in progress All other data sets have various states of QA QC is not current on other data sets

6. Core Data Availability DatafilePeriodContributor Bonanza Creek Experimental Forest Precipitation (Water Buckets/Rain Gauges) at BCEF LTER sites: Weekly 06/11/1985 - 09/13/2000 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Barometric Pressure at LTER1 and LTER2, 1995 – Present 06/06/1995 - 12/31/2005 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Dew Point measurements: hourly (1988 - Present) 06/01/1988 - 08/03/2007 Charlton, Brian Bonanza Creek Experimental Forest: Evaporation measurements from core sites: hourly (1988 - Present) 06/01/1988 - 08/03/2007 Charlton, Brian Bonanza Creek Experimental Forest: Hourly Relative Humidity (mean, min, max) at 50 cm and 150 cm from 1988 to Present 06/01/1988 - 08/03/2007 Charlton, Brian Bonanza Creek Experimental Forest: Hourly Precipitation data, 1988 to Present 06/01/1988 - 08/03/2007 Hollingsworth, Jamie

7. Core Data Availability DatafilePeriodContributor Bonanza Creek Experimental Forest: Hourly Snow depth data, 1988 to Present 12/31/1993 - 02/01/2005 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Hourly Soil Moisture at varying depths from 1988 to Present 06/01/1988 - 08/03/2007 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Hourly Soil Temperature at varying depths from 1988 to Present 06/01/1988 - 08/03/2007 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Hourly Temperature (mean, min, max) at 50 cm and 150 cm from 1988 to Present 06/01/1988 - 08/03/2007 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Hourly Wind Speed and Wind Direction at 3m and 10 m from 1988 to Present 06/01/1988 - 08/03/2007 Hollingsworth, Jamie Bonanza Creek Experimental Forest: Photosynthetically active radiation (PAR), 1988 - Present 06/01/1988 - 12/30/2005 Charlton, Brian

8. Core Data Availability DatafilePeriodContributor Bonanza Creek Experimental Forest: Precipitation Weighing Bucket Measurements: hourly (1988 - Present) 06/01/1998 - 01/01/2006 Charlton, Brian Bonanza Creek Experimental Forest: PYR measurements: hourly (1988 - Present) 06/01/1988 - 08/03/2007 Charlton, Brian Bonanza Creek Experimental Forest: Snow Pillow measurements: hourly (1988 - Present) 01/01/1989 - 01/01/2006 Charlton, Brian Bonanza Creek Experimental Forest: UV measurements: hourly (1988 - Present) 06/01/1988 - 08/03/2007 Charlton, Brian Bonanza Creek Experimental Forest: Vapor Pressure measurements: hourly (1988 - Present) 06/01/1988 - 08/03/2007 Charlton, Brian Rain, well and river water oxygen and deuterium isotope analyses/values for Bonanza Creek Experimental Forest and LTTG sites ( 2002 - Present) 06/09/2002 - 09/09/2006 Yarie, J.

9. Contributions to network wide data bases CLIMDB – Air temperature and precipitation datasets TRENDS - ??

10. Core data analysis with respect to: Climate variability Successional gradients Successional dynamics Threshold behavior

11. Core data analysis with respect to: Climate variability Seasonal precipitation quantities (mm) during the study period. The total year used for the percentage value runs from 9/10 the previous year to 9/9 the current year. Year Non-growing Season (9/10 – 5/15) (mm) Growing Season (5/16 – 9/9) (mm) Summer Percentage of Total Year (%) LTER1LTER2AirportLTER1LTER2AirportLTER1LTER2Airport 19901611264182967270 19912952308928 199218516215213245 19931911981271044034 1994161126136 4652 19951581051991615660 1996 12011896208130142635260 1997 1331281051439899524448 1998 6185632962148377 1999 100711941371505868 2000 189185144218171161544853 2001 133110115141123138515354 2002 13222021217457 2003 9423171 2004 134106838038 2005 14821818516953 2006 13075112183130135586355 Avg 153114127197141154565354

12. Future analysis of data – one example LTER2 - Floodplain weather station Joy Clein

13. Recommendations Add a QA/QC column in the list of datasets Finish QA/QC on all climate datasets Move the QA/QC line in the dataset descriptions to its own section after the Methodology section Perform all necessary tasks to maintain the QA on all sensors Sensor placement design dependent on new proposal direction – but this is a “LONG-TERM” experiment

14. Other opportunities