HF030

Attributes in entity 3: Xylem water isotopes		Details
1. DBCODE Definition: FSDB Database Code Domain: enum
2. ENTITY Definition: Entity number Units: number Domain: range (minimum = 3.  maximum = 3.)
3. SAMPLE_DATE Definition: Date of sample collection in the field Units: date as date type Domain: range (minimum = Jun 28 2004  maximum = Aug 31 2005)
4. SAMPLE_TIME Definition: Approximate time of sample collection in the field (Pacific Standard Time) Domain: freetext
5. CAMPAIGN_CODE Definition: Year and month when sampling occurred Domain: enum
6. PLOTID Definition: Permanent veg plot code - samples were collected just outside veg plots Domain: place
7. PLOT Definition: plot number Units: number Domain: range (minimum = 3.  maximum = 39.)
8. TREE_TAG Definition: Trees were tagged and repeatedly sampled. Sometimes a duplicate sample was collected during the last set of sampling. Units: number Domain: range (minimum = 401.  maximum = 502.)
9. SPECIES Definition: Tree species code Domain: taxa
10. SAMPLE_NO Definition: Sample is # of 3 cores or branch piece collected from each tree Units: number Domain: range (minimum = 1.  maximum = 3.)
11. REP Definition: Replicate sample for a sample_date, tree_tag, sample_no Units: number Domain: range (minimum = 1.  maximum = 2.)
12. DELTA2H Definition: Delta-2H isotopic ratio (2H/1H) of the sample (relative to the Vienna Standard Mean Ocean Water (VSMOW)) Units: permil Domain: range (minimum = -126.142  maximum = -66.199)
13. DELTA18O Definition: Delta-18O isotopic ratio (18O/16O) of the sample (relative to the Vienna Standard Mean Ocean Water (VSMOW)) Units: permil Domain: range (minimum = -19.873  maximum = -6.573)
14. D_EXCESS Definition: d-excess = DELTA2H - 8*DELTA18O Units: permil Domain: range (minimum = -31.347  maximum = 32.839)
15. SAMPLE_ID Definition: EPA ISIRF laboratory ID # Domain: freetext