Identification

Title

Climatology, long-term trend, and solar response of Na density based on 28 years (1990–2017) of midlatitude mesopause Na lidar observation

Abstract

The climatology of earth's Na density over Fort Collins, CO (41 degrees N, 105 degrees W) based on nocturnal Na lidar observations between 1990 and 1999 was reported by She et al(2000, https://doi.org/10.1029/2000gl003825). Based on a continued 28-year data set between 1990 and 2017 with the latter part observed over Logan, UT (42N, 112W), we update the seasonal variations between 80 and 110 km. This data set is also used to deduce long-term responses of Na density (profile) between 75 and 110 km, showing a positive linear trend between 75 and 93 km (with maximum similar to 2.87 x 10(8) m(-3)/decade at 87 km); it turns negative before approaching zero at 110 km (with minimum similar to-2.96 x 10(7) m(-3)/decade at 100 km). The associated solar response is also positive for the altitude range in question (with maximum similar to 5.20 x 10(6) m(-3)/SFU at 91 km). We also derived the 28-year mean Na layer column abundance, centroid altitude, and root mean square width to be 3.92 +/- 2.14 10(13) m(-2), 91.3 +/- 1.0 km, and 4.62 +/- 0.56 km, respectively, and deduced long-term trend and solar cycle responses of column abundance and centroid altitude, respectively to be 7.81 +/- 1.63%/decade and 16.9 +/- 2.8%/100SFU, and -355 +/- 35 m/decade and -1.94 +/- 0.69 m/SFU. We explained conceptually how positive long-term responses in Na density led to positive responses in column abundance and negative responses in centroid altitude.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d76m3bxk

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

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keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

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Temporal reference

Temporal extent

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End position

Dataset reference date

date type

publication

effective date

2023-11-22T00:00:00Z

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Conformity

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Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

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