Investigating the Roles of External Forcing and Ocean Circulation on the Atlantic Multidecadal SST Variability in a Large Ensemble Climate Model Hierarchy
نویسندگان
چکیده
Abstract This paper attempts to enhance our understanding of the causes Atlantic multidecadal variability (AMV). Following literature, we define AMV as SST averaged over North basin, linearly detrended and low-pass filtered. There is an ongoing debate about drivers AMV, which include internal generated from ocean or atmosphere (or both) external radiative forcing. We test role these factors in explaining time history, variance, spatial pattern using a 41-member ensemble fully coupled version CESM 10-member slab ocean. The large allows us isolate forcing versus variability, model differences allow circulation. Both with without circulation, explains more than half variance observed series, indicating its important simulating twentieth-century phases. In this net effect processes reduce AMV. Dynamical coupling also reduces ability simulate characteristic but has little impact on pattern. Historical improves history simulation, while realistic representation below that lowers correlation observations.
منابع مشابه
investigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
Predictability of North Atlantic Multidecadal Climate Variability
Atmospheric weather systems become unpredictable beyond a few weeks, but climate variations can be predictable over much longer periods because of the coupling of the ocean and atmosphere. With the use of a global coupled ocean-atmosphere model, it is shown that the North Atlantic may have climatic predictability on the order of a decade or longer. These results suggest that variations of the d...
متن کاملinvestigating the interaction of language knowledge and strategic competence in the performance of efl learners on reading-to-write and writing-only test tasks
این مطالعه به دو روش کمی و کیفی و با هدف بررسی استراتژی های فراشناختی فراگیران زبان انگلیسی به عنوان زبان خارجی در دو آزمون نوشتن و نوشتن ترکیبی انجام پذیرفت. در بخش کمی برای سنجش میزان استراتژی های فراشناختی از یک پرسشنامه که بر اساس مدل بکمن و پالمر (1996) ساخته شده بود استفاده شد. پایایی و روایی سازه ی پرسشنامه هنگام مطالعه ی پایلوت و روایی محتوای آن با جمع آوری نظرات نُه متخصص در رشته سنجیده...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Climate
سال: 2021
ISSN: ['1520-0442', '0894-8755']
DOI: https://doi.org/10.1175/jcli-d-20-0167.1