Atmospheric Processes Associated with Summer Floods and Droughts in the Central United States

Mo, Kingtse C.; Paegle, Jan; Higgins, R. Wayne

doi:10.1175/1520-0442(1997)010<3028:apawsf>2.0.co;2

Cited by 124 publications

(99 citation statements)

References 10 publications

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“…The Great Plains flood of 1993 and drought of 1988 related strongly to variations in GPLLJ strength and associated moisture transport and convergence (Weaver et al 2009a). Enhanced moisture transport by the GPLLJ is also found to support composites of observed wet events (Mo et al 1997). Cook et al (2008b) examine predicted changes in the GPLLJ in AOGCMs that were run for the IPCC AR4.…”

Section: Introductionmentioning

confidence: 74%

Mid-twenty-first century climate change in the Central United States. Part II: Climate change processes

Patricola

Cook

2012

Clim Dyn

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Section: Introductionmentioning

confidence: 74%

Mid-twenty-first century climate change in the Central United States. Part II: Climate change processes

Patricola

Cook

2012

Clim Dyn

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“…The principal atmospheric features that typically impact the influx of moisture over North America associated with high precipitation events have been documented (e.g. Higgins et al, 1997;Mo et al, 1997;Dominguez and Kumar, 2005). These include anomalous cyclonic circulation over the central NP Ocean centred around 45°N and 170°W, enhanced westerlies over eastern Pacific/western North America, an uncharacteristically strong GPLLJ that transports significant amount of moisture into the United States, an anomalous anticyclonic circulation over the tropical western Atlantic Ocean, and a large negative (positive) mid-tropospheric height anomaly over the central/west United States and Canada (southeastern United States).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric aspects of the 2008 Midwest floods: a repeat of 1993?

Coleman

Budikova

2009

Intl Journal of Climatology

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This paper identifies and documents the major large-scale atmospheric circulation characteristics that preceded and facilitated the devastating floods across the Midwestern United States along the upper Mississippi, Missouri, and Wabash River basins in the late spring/early summer of 2008. These circulation features were also placed in the context of the 1993 floods that occurred within a similar temporal and spatial domain. This process included investigating the relationship between various atmospheric conditions and the timing of flood-producing rainfall events at monthly and sub-monthly timescales. Unlike in 1993, the 2008 flood event took place 1 month earlier in the year (May), lasted over a much shorter time period, and extended eastwards into Indiana. The comparison confirmed much previous work regarding the factors associated with Midwest flooding during the early warm-season and revealed the possible influence of the state of the North Atlantic Ocean and the North Atlantic oscillation (NAO) on warm-season flooding across the Midwest. Both the 2008 and 1993 events were preceded by an NAO positive phase; the pattern switched phase about 2 months before the onset of the flooding and remained negative for the duration of the floods. While the major atmospheric conditions known to be associated with major flooding across the Midwest were present in 2008 (e.g. a strong Great Plains low-level jet), the level of their development, persistence, and geographic orientation/position was very distinct from those observed in 1993. These conditions were also embedded in different state of the remote hemispheric circulation over the Pacific North American region. Together, these variations contributed to the 2008 Midwest floods that occurred earlier in the warm season, were shorter-lived, and had an impact on a slightly different geographic area.

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“…Accurate prediction requires detailed understanding of the competing roles of local effects (e.g., soil moisture) and remote forcings (e.g., tropical sea surface temperature (SST) anomalies). One way to develop this understanding is by diagnosing relationships between potentially important surface and atmospheric processes [Mo et al, 1997;Roads et al, 1997]. In particular, we ask the following: Are there consistent differences in water and energy cycles between wet and dry years, and if so can these differences be related to specific local and remote factors?…”

Section: Introductionmentioning

confidence: 99%

Diagnosing warm season precipitation over the GCIP region from a GCM and reanalysis

Oglesby¹,

Marshall²,

Roads³

et al. 2001

J. Geophys. Res.

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Atmospheric Processes Associated with Summer Floods and Droughts in the Central United States

Cited by 124 publications

References 10 publications

Mid-twenty-first century climate change in the Central United States. Part II: Climate change processes

Mid-twenty-first century climate change in the Central United States. Part II: Climate change processes

Atmospheric aspects of the 2008 Midwest floods: a repeat of 1993?

Diagnosing warm season precipitation over the GCIP region from a GCM and reanalysis

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