http://vocab.lternet.edu/vocab/vocab/http://vocab.lternet.edu/vocab/vocab/skos/636winter http://vocab.lternet.edu/vocab/vocab/skos/636 frost RT http://vocab.lternet.edu/vocab/vocab/skos/636 ice RT http://vocab.lternet.edu/vocab/vocab/skos/636 snow RT http://vocab.lternet.edu/vocab/vocab/skos/636 temporal properties BT