SSHCZO -- Vegetation, Stable Isotopes -- Shale Hills -- (2012)

OVERVIEW

Description/Abstract

Water residence time of ridge-top trees was studied using the deuterium tracer technique combined with sap flow in 2012. Trees were injected with deuterium tracer and the tracer was measured in leaf condensate on subsequent days. Leaves were sampled regularly by climbing trees and 50 foot tall scaffolding.

Creator/Author

Gaines, Katie|Eissenstat, David M.

CZOs

Shale Hills

Contact

Katie Gaines, kpgaines@psu.edu; David Eissenstat, dme9@psu.edu

Subtitle

Level 1 - Quality Controlled Data

SUBJECTS

Disciplines

Biology / Ecology|Hydrology

Topics

Vegetation|Stable Isotopes

Keywords

ecohydrology|vegetation|isotopes|tracer|tree water|deuterium|residence time|transit time

Variables

Tower Number|Tree ID|Tree Group|Sapflux ID|Tree species|Diameter at Breast Height (cm)|Circumference (cm)|X Coordinate|Y Coordinate|Deuterium Mass (g)|Injected Deuterium Mass (g)|Data Logger ID A Port|Data Logger ID B Port|Injection Date|Injection Start Time|Injection Finish Time|Sap Flux Time|Record ID Number for Sap Flux Datalogger|Battery Voltage|diff1_Avg(1) Differential (degrees C)|Sample Number|Sampling Date. Tree ID|Species Name|δ2H Reportable Value (permil)|δ2H Standard Deviation (permil)|δ18O Reportable Value (permil)|δ18O Standard Deviation (permil)

Variables ODM2

delta-18O of H2O|Deuterium|Battery voltage|Circumference|Diameter at breast height (DBH)|Temperature|Recorder code|Sap flow|Species|Longitude|Latitude

TEMPORAL

Date Start

2012-04-04

Date End

2012-10-27

SPATIAL

Field Areas

Susquehanna Shale Hills Critical Zone Observatory

Location

Shale Hills

North latitude

40.6658305116

South latitude

40.6656871844

West longitude

-77.9049719159

East longitude

-77.9040066461

REFERENCE

Citation

The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF-supported Shale Hills Susquehanna Critical Zone Observatory.

CZO ID

2654

COMMENTS

Comments

Leaves were placed in sealed plastic bags under lamps in greenhouse upon returning to the lab each day and condensate was removed from bags and stored in sealed vials. Condensate was run on a Los Gatos water isotopic analyzer in the lab of Christopher Duffy (cxd11@psu.edu). Fixed depth sap flow probes were used (2 pairs in each tree) and sap flow was monitored from April to November.