Sensitivity of simulated sea breezes to initial conditions in complex coastal regions

Kelly Lombardo, Eric Sinsky, Yan Jia, Michael M. Whitney, James Edson

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Mesoscale simulations of sea breezes are sensitive to the analysis product used to initialize the simulations, primarily due to the representation of the coastline and the coastal sea surface temperatures (SSTs) in the analyses. The use of spatially coarse initial conditions, relative to the horizontal resolution of the mesoscale model grid, can introduce errors in the representation of coastal SSTs, in part due to the incorrect designation of the land surface. As a result, portions of the coastal ocean are initialized with land surface temperature values and vice versa. The diurnal variation of the sea surface is typically smaller than over land on meso- and synoptic-scale time scales. Therefore, it is common practice to retain a temporally static SST in numerical simulations, causing initial SST errors to persist through the duration of the simulation. These SST errors influence horizontal coastal temperature and humidity gradients and thereby the development of the sea-breeze circulations. The authors developed a technique to modify the initial surface conditions created from a reanalysis product [North American Regional Reanalysis (NARR)] for simulations of two sea-breeze events over the New England coast to more accurately represent the finescale structure of the coastline and the spatial representation of the coastal land surface and SST. Using this technique, the coastal SST (2-m temperature) RMSE is reduced from as much as 25°-1°C (7°-1°C), contributing to a more accurate propagation of the sea-breeze front. Techniques described in this work may be important for mesoscale simulations and forecasts of other coastal phenomena.

Original languageEnglish (US)
Pages (from-to)1299-1320
Number of pages22
JournalMonthly Weather Review
Volume144
Issue number4
DOIs
StatePublished - Apr 1 2016

Fingerprint

sea surface temperature
sea breeze
simulation
land surface
coast
sea
diurnal variation
sea surface
humidity
surface temperature
temperature
timescale
ocean
product

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Lombardo, Kelly ; Sinsky, Eric ; Jia, Yan ; Whitney, Michael M. ; Edson, James. / Sensitivity of simulated sea breezes to initial conditions in complex coastal regions. In: Monthly Weather Review. 2016 ; Vol. 144, No. 4. pp. 1299-1320.
@article{c55549f7bc144c37846b828ae6d75269,
title = "Sensitivity of simulated sea breezes to initial conditions in complex coastal regions",
abstract = "Mesoscale simulations of sea breezes are sensitive to the analysis product used to initialize the simulations, primarily due to the representation of the coastline and the coastal sea surface temperatures (SSTs) in the analyses. The use of spatially coarse initial conditions, relative to the horizontal resolution of the mesoscale model grid, can introduce errors in the representation of coastal SSTs, in part due to the incorrect designation of the land surface. As a result, portions of the coastal ocean are initialized with land surface temperature values and vice versa. The diurnal variation of the sea surface is typically smaller than over land on meso- and synoptic-scale time scales. Therefore, it is common practice to retain a temporally static SST in numerical simulations, causing initial SST errors to persist through the duration of the simulation. These SST errors influence horizontal coastal temperature and humidity gradients and thereby the development of the sea-breeze circulations. The authors developed a technique to modify the initial surface conditions created from a reanalysis product [North American Regional Reanalysis (NARR)] for simulations of two sea-breeze events over the New England coast to more accurately represent the finescale structure of the coastline and the spatial representation of the coastal land surface and SST. Using this technique, the coastal SST (2-m temperature) RMSE is reduced from as much as 25°-1°C (7°-1°C), contributing to a more accurate propagation of the sea-breeze front. Techniques described in this work may be important for mesoscale simulations and forecasts of other coastal phenomena.",
author = "Kelly Lombardo and Eric Sinsky and Yan Jia and Whitney, {Michael M.} and James Edson",
year = "2016",
month = "4",
day = "1",
doi = "10.1175/MWR-D-15-0306.1",
language = "English (US)",
volume = "144",
pages = "1299--1320",
journal = "Monthly Weather Review",
issn = "0027-0644",
publisher = "American Meteorological Society",
number = "4",

}

Sensitivity of simulated sea breezes to initial conditions in complex coastal regions. / Lombardo, Kelly; Sinsky, Eric; Jia, Yan; Whitney, Michael M.; Edson, James.

In: Monthly Weather Review, Vol. 144, No. 4, 01.04.2016, p. 1299-1320.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sensitivity of simulated sea breezes to initial conditions in complex coastal regions

AU - Lombardo, Kelly

AU - Sinsky, Eric

AU - Jia, Yan

AU - Whitney, Michael M.

AU - Edson, James

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Mesoscale simulations of sea breezes are sensitive to the analysis product used to initialize the simulations, primarily due to the representation of the coastline and the coastal sea surface temperatures (SSTs) in the analyses. The use of spatially coarse initial conditions, relative to the horizontal resolution of the mesoscale model grid, can introduce errors in the representation of coastal SSTs, in part due to the incorrect designation of the land surface. As a result, portions of the coastal ocean are initialized with land surface temperature values and vice versa. The diurnal variation of the sea surface is typically smaller than over land on meso- and synoptic-scale time scales. Therefore, it is common practice to retain a temporally static SST in numerical simulations, causing initial SST errors to persist through the duration of the simulation. These SST errors influence horizontal coastal temperature and humidity gradients and thereby the development of the sea-breeze circulations. The authors developed a technique to modify the initial surface conditions created from a reanalysis product [North American Regional Reanalysis (NARR)] for simulations of two sea-breeze events over the New England coast to more accurately represent the finescale structure of the coastline and the spatial representation of the coastal land surface and SST. Using this technique, the coastal SST (2-m temperature) RMSE is reduced from as much as 25°-1°C (7°-1°C), contributing to a more accurate propagation of the sea-breeze front. Techniques described in this work may be important for mesoscale simulations and forecasts of other coastal phenomena.

AB - Mesoscale simulations of sea breezes are sensitive to the analysis product used to initialize the simulations, primarily due to the representation of the coastline and the coastal sea surface temperatures (SSTs) in the analyses. The use of spatially coarse initial conditions, relative to the horizontal resolution of the mesoscale model grid, can introduce errors in the representation of coastal SSTs, in part due to the incorrect designation of the land surface. As a result, portions of the coastal ocean are initialized with land surface temperature values and vice versa. The diurnal variation of the sea surface is typically smaller than over land on meso- and synoptic-scale time scales. Therefore, it is common practice to retain a temporally static SST in numerical simulations, causing initial SST errors to persist through the duration of the simulation. These SST errors influence horizontal coastal temperature and humidity gradients and thereby the development of the sea-breeze circulations. The authors developed a technique to modify the initial surface conditions created from a reanalysis product [North American Regional Reanalysis (NARR)] for simulations of two sea-breeze events over the New England coast to more accurately represent the finescale structure of the coastline and the spatial representation of the coastal land surface and SST. Using this technique, the coastal SST (2-m temperature) RMSE is reduced from as much as 25°-1°C (7°-1°C), contributing to a more accurate propagation of the sea-breeze front. Techniques described in this work may be important for mesoscale simulations and forecasts of other coastal phenomena.

UR - http://www.scopus.com/inward/record.url?scp=84966286498&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84966286498&partnerID=8YFLogxK

U2 - 10.1175/MWR-D-15-0306.1

DO - 10.1175/MWR-D-15-0306.1

M3 - Article

AN - SCOPUS:84966286498

VL - 144

SP - 1299

EP - 1320

JO - Monthly Weather Review

JF - Monthly Weather Review

SN - 0027-0644

IS - 4

ER -