NASA Blue Marble ie true color image of a the Intermountain West and b the Wasatch Front and adjoining region Geographic features discussed in text annotated a b Still need to add stations and geographic references ID: 179691
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Slide1
Figure 1.
NASA Blue Marble (i.e., true color) image of (a) the Intermountain West and (b) the Wasatch Front and adjoining region. Geographic features discussed in text annotated.
a
)
b
)
Still need to add stations and geographic references.Slide2
Figure
2. Examples of Wasatch Mountain
snowpacks (a) without dust loading (Ben Lomond Peak, 26 Apr 2005) and (b) with dust loading from episodic dust events (Alta, UT, 30 Apr 2009).
a)
Ben Lomond Peak 26 Apr 2005
b
) Alta 30 Apr 2000Slide3
Figure 3
. Number of dust events at KSLC by water year.Slide4
Figure
4. Minimum visibility (km) during KSLC dust events.Slide5
Figure
5. Estimated cumulative dust flux during KSLC dust events by water year.Slide6
Figure
6. Number of dust events at KSLC by month.Slide7
Figure
7. Estimated mean cumulative dust flux during KSLC dust events by
month.Slide8
Figure
8. Number of observations at KSLC with a wind speed > 10 m s-1 by month.
Comment: Is this normalized? Specials skew this slightly.. We may need to discuss and revise, although I don’t expect results to change that much. Slide9
Figure 9. Number of dust reports at KSLC by time of day (MST).Slide10
Figure
10. Number of observations at KSLC with a wind speed > 10 m s-1 by time of day (MST)Slide11
Figure 11. Wind rose for KSLC dust reports. Slide12
Figure
12. Fraction (%) of estimated cumulative dust flux as a function of wind direction at KSLC. Slide13
Figure
13. Number of recent (2001–2010) dust events at KSLC by month.Slide14Slide15
KSLC
Figure 14. Weather conditions during the 19 May 2006 dust event. (a) 1600 MST KMTX 0.5º radar reflectivity (dBZ following scale at upper right) and topography (color filled
at X m intervals). (b) 1700 MST NARR 700-hPa temperature (shaded following scale at bottom) and wind (full and half barb denote 2.5 and 5 m s-1, respectively).
Always need to use scales. Add one for reflectivity at left. Suggest higher wind density at right and using contours rather than b/w fill. Bummer that we have to mix b/w and color. What is time of the NARR analysis? Can’t be 1600 MST.
a
) KMTX:
1600 MST 19 May 2006
b
) NARR 700
hPa
:
1700 MST 19 May 2006
Reflectivity
(
DbZ
)
10
20
30
40
50
60
Elevation (
m
)
1350
1700
2050
2400Slide16
Figure
15. Number of dust reports relative to frontal passage during recent (2001–2010) dust events with a mobile or baroclinic trough passage from the west or northwest at KSLC.Slide17
Figure
16. Weather conditions during the 10 May 2004 dust event. (a) XXXX MST GOES visible satellite imagery with dust identified in red. (b) XXXX MST NARR 850-hPa geopotential height. (c) XXXX MST NARR 700-hPa temperature (shaded following scale at bottom) and wind (full and half barb denote 2.5 and 5 m s
-1, respectively).
Need to work on this. Suggest converting from eps to tiff before importing.Slide18
Figure
17. Frequency of NARR (a) 700-mb wind speed, (b) 700-hPa wind direction, and (c) boundary layer depth at KSLC at the time of initial dust report during the cold front and
baroclinic trough passage events from the west and northwest (solid) and in a 21-day weighted climatology centered on the event dates.
Will need to discuss this and updated it for 21-day running mean. May need to do maximum boundary layer depth instead of depth at time of observation.Slide19
Figure
18. Dust plume origins and orientations associated with dust reports from observing stations and observer notes as identified following the color scale at upper left.
Jeff-given our emphasis on the Wasatch Front, I wonder if we should color fill this as follows:KSLC only
KSLC and other stations and/or notesNotes onlyDelta onlyElko onlyPocatello only
Multiple stations/notes, but no KSLCPick color scales so that the sites in Utah are fairly close. Slide20Slide21
Figure
19. HYSPLIT 6 h backtrajectories from 1000-m above ground level for all KSLC dust events since 2004.
Regenerate without lakes if possible.