Alphabetical listing of categories: O

a b c d e f g h i j k l m n O p q r s t u v w x y z

Number of information resources is shown in parentheses after each term.

field observation -> field inventory and monitoring (28) weather observations (2) -> field inventory and monitoring WITH atmospheric and climatic processes earthquake occurrence maps (5) -> earthquake occurrences WITH maps and atlases earthquake occurrences (10) ocean-atmosphere interaction (1) ocean bottom characteristics -> sea-floor characteristics (19) ocean characteristics (21) ocean chemistry -> marine chemistry (1) ocean mixed-layer depth -> ocean characteristics (21) ocean monitoring (8) -> field inventory and monitoring WITH ocean characteristics chemical oceanography -> marine chemistry (1) geological oceanography -> marine geology (36) oceanography -> ocean sciences (4) physical oceanography -> ocean sciences (4) ocean processes (1) ocean sciences (4) ocean surface characteristics -> ocean characteristics (21) ocean temperature (2) ocean waves (1) collection of specimens -> specimen collecting (1) bodies of water -> hydrographic features (12) oil resources (1) oil wells -> wells (4) open pit mines -> mine sites (9) ore deposits -> mineral deposits (1) ore deposits (metallic) -> metallic mineral resources (6) metallic ores -> metallic mineral resources (6) organism groupings (non-taxonomic) (3) biological organisms -> organisms (8) organisms (8) orienteering -> geolocation measurement (1) Ostracoda -> ostracodes (5) ostracodes (5) ostracods -> ostracodes (5) outfall -> contamination and pollution (8) overfalls -> hydrographic features (12) intermittent oxbow lakes -> lakes (4) oxbow lakes -> lakes (4) oxidation and reduction (1)