Univ.-Prof. Dr. Ferdinand Steinhauser — Zum 75. Geburtstag

Ohne Zusammenfassung     

Response to commentary by J. L. Bamber,W. P. Aspinall and R. M. Cooke (2016)

In a commentary paper, Bamber et al. (Nat Clim Change 3:424–427, 2016) respond to our recent assessment (De Vries and Van de Wal Clim Change 1–14, 2015) of their expert judgment based study on projections of future sea level rise due to the melting of the large ice sheets (Bamber and Aspinall Nat Clim Chang 3:424–427, 2013). In this response we comment on their remarks.     

R.W. Stewart

Abstract

The physical mechanism that causes an interdecadal oscillation in a coarse resolution sector ocean model forced by mixed boundary conditions is studied. The oscillation is characterized by large fluctuations in convective activity and air/sea heat exchange on a decadal timescale. Changes in the subsurface temperature and surface salinity are essential for the existence of the oscillation. It is shown that a large part of these variations can be explained with the hypothesis of a constant ocean velocity field. This may easily lead to the erroneous conclusion that the oscillation is mainly a “nondynamical” phenomenon. In this paper it is demonstrated that the ocean dynamics play an essential role in explaining decadal oscillations.     

美国现行的地基气象观测系统

美国气象部门在近十几年对其地基气象观测系统进行了新的一轮现代化的更新换代.目前,这一过程已基本完成.现对该系统的主要情况和特点作简要的介绍.