Short Description: 14C
Official Name: carbon-14
Short Description: 14C
Official Name: carbon-14
Short Description: stable oxygen isotope 17
Official Name: 17O
Short Description: stable oxygen ration 18
Official Name: 18O
Short Description: absorbance
Official Name: absorbance
Units: unitless
Short Description: absorbance_sd
Official Name: absorbance_sd
Units: unitless
Short Description: absorption coefficient
Official Name: absorption coefficient
Units: 1/m
Short Description: abundance
Official Name: abundance
Units: various
Short Description: abundance_total
Official Name: abundance_total
Units: number/m^3
Short Description: actinium-227
Official Name: actinium-227
Units: various
Short Description: acantharian Carbon biomass
Official Name: acanth_C
Units: nanograms C/liter
Short Description: Acoustic backscatter in the water column
Official Name: Acc_bksctr
Units: various
Short Description: acceleration
Official Name: acceleration
Short Description: accession number
Official Name: accession number
Units: unitless
Short Description: acrylate
Official Name: acrylate
Units: variable
Short Description: action
Official Name: action
Units: dimensionless
Short Description: activity and comments
Official Name: activity_and_comments
Units: dimensionless
Short Description: Ag110_area_8847keV
Official Name: Ag110_area_8847keV
Units: counts
Short Description: Ag110m_conc_dry
Official Name: Ag110m_conc_dry
Units: millibequerels/gram of dry weight
Short Description: age
Official Name: age
Units: variable (see dataset)
Short Description: age_by_len
Official Name: age_by_len
Units: years or text i.e. adult
Keyword Searches
Keyword searches are parsed into a series of terms and operators.
Terms can be a single word —plankton or carbon — or a phrase surrounded by double quotes —"ocean acidification"
Operators allow you to customize the text search in the following ways:
Wildcards
Wildcard searches can be run on individual terms, using:
?
to replace a single character:
carbon?te
*
to replace zero or more characters:,
ocean acid*
Boolean Operators
The preferred operators are:
+
(this term must be present)
-
(this term must not be present)
"coral calcification" +biota -pacific
- biota
must be present
- pacific
must not be present
- "coral calcification"
is optional - its presense increases the relevance
Fuzzy Matching
We can search for terms that are similar to, but not exactly like our search terms, using the "fuzzy" operator: ~
. This uses the Damerau-Levenshtein distance to find all terms with a maximum of two changes, where a change is the insertion, deletion or substitution of a single character, or transposition of two adjacent characters. The default edit distance is 2, but you can specify the distance:
"carbon"~3
Proximity Searches
While a phrase query (eg "john smith") expects all of the terms in exactly the same order, a proximity query allows the specified words to be further apart or in a different order. In the same way that fuzzy queries can specify a maximum edit distance for characters in a word, a proximity search allows us to specify a maximum edit distance of words in a phrase:
"primary production"~3