Impact of Initial and Boundary Conditions on Coupled Model Simulations for Bay of Bengal

IF 2 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Marine Geodesy Pub Date : 2021-12-15 DOI:10.1080/01490419.2021.2006376

Shailee Patel, Manisha Vithalpura, S. Mallick, S. Ratheesh

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引用次数: 2

Abstract

Abstract This study investigates the response of a high resolution coupled physical-ecosystem model simulations to initial and boundary conditions (IBCs) from various sources. For this purpose, we used physical parameters from the data sets World Ocean Atlas (WOA09), CSIRO Atlas of Regional Seas (CARS09) and North Indian Ocean Atlas (NIOA). Evaluating model simulated fields with standard validation data suggests that all three experiments could resolve most of the known surface and subsurface features of the Bay of Bengal (BoB) but with considerable differences in salinity and chlorophyll-a (Chl-a) and negligible differences in temperature among model simulations with various IBCs. The modeled Chl-a is well simulated with WOA09 as compared to NIOA and CARS09 data for climatological model simulations, with a correlation of 0.52 for the BoB. Moreover, the vertical distribution of Chl-a is found to be a function of nutrient supply to the base of the euphotic layer and mixed layer. These results significantly highlight the implicit and explicit use of IBCs for better representation of Chl-a concentration in the BoB from a high-resolution coupled model.

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初始和边界条件对孟加拉湾耦合模型模拟的影响

摘要本研究研究了高分辨率耦合物理生态系统模型模拟对各种来源的初始和边界条件（IBCs）的响应。为此，我们使用了来自世界海洋图集（WOA09）、CSIRO区域海洋图集（CARS09）和北印度洋图集（NIOA）的数据集的物理参数。用标准验证数据评估模型模拟场表明，所有三个实验都可以解决孟加拉湾（BoB）的大部分已知地表和地下特征，但在使用各种IBC的模型模拟中，盐度和叶绿素a（Chl-a）差异很大，温度差异可以忽略不计。与气候模型模拟的NIOA和CARS09数据相比，WOA09很好地模拟了模拟的Chl-a，BoB的相关性为0.52。此外，叶绿素a的垂直分布是向透光层和混合层底部提供营养的函数。这些结果显著突出了IBC的隐式和显式使用，以更好地表示高分辨率耦合模型中BoB中的Chl-a浓度。

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来源期刊

Marine Geodesy 地学-地球化学与地球物理

CiteScore

4.10

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： The aim of Marine Geodesy is to stimulate progress in ocean surveys, mapping, and remote sensing by promoting problem-oriented research in the marine and coastal environment. The journal will consider articles on the following topics: topography and mapping; satellite altimetry; bathymetry; positioning; precise navigation; boundary demarcation and determination; tsunamis; plate/tectonics; geoid determination; hydrographic and oceanographic observations; acoustics and space instrumentation; ground truth; system calibration and validation; geographic information systems.