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Trends in Surface Elevation and Accretion in a Retrograding Delta in Coastal Mississippi, USA from 2012 – 2016

Authors :
Jonathan Pitchford
Kimberly Cressman
Julia A Cherry
Brook T Russell
Jay McIlwain
Michael J Archer
William V Underwood
Publication Year :
2022
Publisher :
Research Square Platform LLC, 2022.

Abstract

The Grand Bay estuary is in the north-central Gulf of Mexico and lacks riverine sediment input for marsh elevation maintenance. This study quantified trends in surface elevation change and accretion along an elevation gradient within the estuary. Elevation change rates were compared to short (13.71 mm/yr; 95% CI: -2.38 – 29.81), medium (6.97 mm/yr; 95% CI: 3.31 – 10.64), and long-range (3.50 mm/yr; 95% CI: 2.88 – 4.11) water level rise (WLR) rates for the region. Elevation change rates ranged from 0.54 mm/yr (95% CI: -0.63 – 1.72) to 5.45 mm/yr (95% CI: 4.27 – 6.62) and accretion rates ranged from 0.82 mm/yr (95% CI: -0.16 – 1.80) to 3.89 mm/yr (95% CI: 2.90 – 4.89) among marsh zones. Only the elevation change rate at a Juncus roemerianus marsh located high in the tidal frame was lower than long- ( P

Details

Database :
OpenAIRE
Accession number :
edsair.doi...........6fd8c0f5d0675028e0c815962c1a54ea
Full Text :
https://doi.org/10.21203/rs.3.rs-1247565/v1