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Paleoclimatic settings have been reconstructed for the Campanian using original oxygenisotopic analyses of well-preserved molluskan and foraminifera shells from Russian Far East, Hokkaido, USA, Belgium and some DSDP holes (95,98,102,390A, and 392A) in North Atlantic. Early Early Campanian climatic optimum has been recognized from data on high bottom shelf water paleotemperatures in middle latitudes of both the western circum-Pacific (to 24.2"C) and the eastem circum-Pacific (to 26.4"C) areas and high bottom shallow water paleotemperatures in high latitudes of the Koryak Upland (22.4-25SoC), which agrees with the data on the Campanian Barykovskaya flora in high latitudes (Golovneva and Herman, 1998) and Jonker flora and its equivalents in middle latitudes. Judging from the data on comparatively high bottom shallow water paleotemperature values in high latitudes, South Alaska (19.4"C) and the Koryak Upland (22.4-25.5"C), we also expect Latest Campanian temperature maximum, which has not been confirmed, however, for low and middle latitudes by neither of isotopic nor paleobotanic data now. Main climatic tendency during the Campanian (with the exception of Latest Campanian) has been learned from isotopic composition of Campanian aragonitic ammonoid shells from the Hokkaido-South Sakhalin (Krilyon) marine basin. In contrary to Huber's et al. (2002) assumption, we expect warm greenhouse conditions during the most part of the Campanian.

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In the Campanian cores of deep water drilling in the Indian Ocean, on the Falklands Plateau, in the central part of the Atlantic Ocean and in the Australian shelf seas, the systematic composition of shells of planktonic foraminifera was studied. The revealed complexes of foraminifera are attributed to one or another type of than at ocenosis. On the basis of the spatial distribution of types of tanatocenoses, maps of climatic zonality for sections of the early, middle beginning, and end of the late campaign have been constructed. Different climatic zones correspond to different types of water masses. In the southern hemisphere, there were three climatic zones, but their sizes and the outline of the boundaries changed during the Campanian period. In the early and middle campaigns, the climate was smooth and mild. The beginning of the late campaign is marked by short-term warming which was replaced by a sharp late Campan cooling. The obtained reconstructions are confirmed by our own and literary data of oxygen isotope analysis.

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