Northwest Pacific typhoons documented by the Philippine Jesuits, 1566–1900

Western North Pacific Typhoons with Concentric Eyewalls

This study examines the intensity change and moat dynamics of typhoons with concentric eyewalls using passive microwave data and best-track data in the western North Pacific between 1997 and 2006. Of the 225 typhoons examined, 55 typhoons and 62 cases with concentric eyewalls have been identified. The data indicate that approximately 57% of category 4 and 72% of category 5 typhoons possessed co...

NASA Scatterometer Observes the Extratropical Transition of Pacific Typhoons

monitored the evolution of the twin typhoons Violet and Tom. They moved north from the western tropical Pacific, acquiring the features of mid-latitude storms, with developing frontal structures, increasing asymmetry, and introduction of dry air into the core of the typhoons. While Violet hit Japan, causing destruction and death (Fig. 1), Tom merged with a mid-latitude trough and evolved into a...

Starlings in the Pacific Northwest

Pacific Northwest Fungi

Epiphytic macrolichen communities were compared among forest stand types in the Blue River watershed of western Oregon. Stand types were defined by stand structure, according to age classes of the younger tree cohort and remnant tree retention. Remnant trees were those in an older cohort that remained following a stand disturbance that initiated tree regeneration, such as a timber harvest or na...

Pacific Northwest Fungi

Podosphaera (Sphaerotheca) euphorbiae on Euphorbia epithymoides (= E. polychroma, cushion spurge) is reported for the first time in North America. Neoerysiphe (Erysiphe) galeopsidis on Lamium amplexicaule (henbit), Blumeria (Erysiphe) graminis on Festuca idahoenis (Idaho fescue), Taphrina johansonii on Populus tremuloides (trembling aspen), and Taphrina occidentalis on Alnus rubra (red alder) a...