Hooghiemstra, H. (1999). Succession in tropical vegetation from Late Quaternary pollen records: signs of natural climatic change and human impact. In Book of Abstracts of Geobotanisches Kolloquium, Geobotanisches Institut der Universität Bern (pp. 1-2)
Hooghiemstra, H., & van 't Veer, R. (1999). A 0.6 million year pollen record from the Colombian Andes. PAGES Newsletter, 99(3), 4-5.
Tzedakis, P. C., Andrieu, V., de Beaulieu, J.-L., Reille, M., Crowhurst, S., Shackleton, N. J., Follieri, M., Madri, D., Hooghiemstra, H., & Wijmstra, T. A. (1999). 0.5 million-year pollen records from southern Europe. PAGES Newsletter, 99(3), 14-15.
Hooghiemstra, H. (1999). Koel regenwoud in de ijstijd. EOS Magazine, Wetenschap en Technologie voor Mens en Maatschappij, 10, 66-66.
Behling, H., & Hooghiemstra, H. (1999). Late Pleistocene paleotemperature estimates for tropical South America based on vegetation changes. In Abstract Symposium 'Global Ocean and Land Surface Temperatures during the Last Ice-Age
Behling, H., Lima da Costa, M., & Hooghiemstra, H. (1999). Carbon storage changes in different ecosystems from tropical South America during last glacial and Holocene times. In Book of Abstracts XV INQUA Congress (pp. 20-20)
Berrio Mogollon, J. C., Behling, H., & Hooghiemstra, H. (1999). Paleo-ecological history of the Colombian rain forest since the Middle Holocene: a comparison between Amazonia and Chocó Biogeographic Area. In Book of Abstracts XV INQUA Congress (pp. 21-22)
Boom, A., Sinnenghe Damsté, J. S., de Leeuw, J., Boon, J. J., & Hooghiemstra, H. (1999). pCO2 and temperature controlled changes in Quaternary altitudinal vegetation distribution in Colombia; a geochemical approach. In Book of Abstracts XV INQUA Congress (pp. 28-29)
Hooghiemstra, H., Mommersteeg, H. J. P. M., & van der Hammen, T. (1999). Stage 5 (including Eemian) climatic change in northern South America (133-70 ka BP): reconstruction from 6 Colombian pollen records. In Book of Abstracts XV INQUA Congress (pp. 83-83)
Hooghiemstra, H. (1999). Wie wil er nu nog promoveren in Nederland? BioNieuws, 13, 2-2.