Reverse transcriptase is characteristic of retroviruses, including HIV (human immunodeficiency virus), the virus responsible for AIDS (acquired immunodeficiency syndrome). All retroviruses encode a polymerase enzyme in their pol gene that is both necessary and sufficient for the replication of their RNA genomes.
PDO positive phase global pattern. The Pacific Decadal Oscillation (PDO) is a robust, recurring pattern of ocean-atmosphere climate variability centered over the mid-latitude Pacific basin.
El Nino. NiÃ±o El nino niÃ±o is the negative phase Of The-El Nino. NiÃ±o Southern oscillation el nino niÃ±o events are associated with the appearance of a warm Ocean Current off the south american Coast And Sustained (NEGATIVE) southern. oscillation index soi valuesl Nino niÃ±o events are often accompanied by cooler than normal sea surface (SSTs) ssts in the Western, pacific and to the north Of. Australia over much Of, australia but particularly Eastern, Australia El nino niÃ±o events are associated with an increased probability of. drier conditions