| |
| |
|
|
|
|
| |
 |
Circulation, biogeochemistry and carbon cycling in ocean margins
|
| |
|
|
Temporal and spatial variations of cross-shelf nutrient exchange in the East China Sea, as estimated by satellite altimetry and in situ measurements
P-M1-01-S
Ruibin Ding* , 1.Ocean College, Zhejiang University
2.State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration
Daji Huang, 1.State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration
2.Ocean College, Zhejiang University
Jiliang Xuan, State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration
Feng Zhou, 1.State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration
2.Ocean College, Zhejiang University
Thomas Pohlmann, Institute of Oceanography, Centre for Marine and Climate Research, University of Hamburg
Presenter Email: kirkding@sina.com |
| The nutrient exchange at the 200 m isobath in the ECS has been studied extensively both by using in situ observational data and numerical simulated data. However, the former one suffered from spatial and temporal limitations while the latter one suffered from uncertainties due to numerical schemes and driving forces. Based on velocity and nutrient data from satellite and in situ measurements, we studied the temporal and spatial variations of 22-year (1993-2014) cross-shelf nutrient exchange at the 200 m isobath section in the East China Sea. We aimed to (i) objectively explore the spatial and temporal variations in nutrient transport by collecting observational data with a large spatial coverage and a long time span and (ii) explore the governing mechanisms of this transport. The cross-shelf nutrient exchange is explored in a general sense and in detail. Nitrate transport showed a significant 3-D spatial structure with annual and inter-annual variations. The spatial structure of the nitrate transport was determined by velocity in the horizontal direction and nitrate concentration in the vertical direction. Temporal variation in nitrate transport was mainly determined by velocity and particularly by its geostrophic component.This study will provide a reasonable guide for future study, particularly numerical simulations. |
|
|
|
|
|
|
|
|