Fisheries of the North American West Coast

1947 ◽  
Vol 37 (4) ◽  
pp. 223
Author(s):  
John Leighly ◽  
Fritz Bartz
Keyword(s):  
North American ◽  
West Coast ◽  
American West ◽  
North American West ◽  
The North

scholarly journals Reversal of Long-Term Trend in Baseline Ozone Concentrations at the North American West Coast

2017 ◽  
Vol 44 (20) ◽  
pp. 10,675-10,681 ◽  
Author(s):  
D. D. Parrish ◽  
I. Petropavlovskikh ◽  
S. J. Oltmans
Keyword(s):  
North American ◽  
West Coast ◽  
American West ◽  
Term Trend ◽  
North American West ◽  
Ozone Concentrations ◽  
The North ◽  
Long Term Trend

scholarly journals Changes in Winter Atmospheric Rivers along the North American West Coast in CMIP5 Climate Models

2015 ◽  
Vol 16 (1) ◽  
pp. 118-128 ◽  
Author(s):  
Michael D. Warner ◽  
Clifford F. Mass ◽  
Eric P. Salathé
Keyword(s):  
Water Vapor ◽  
North American ◽  
West Coast ◽  
American West ◽  
Climate Models ◽  
Water Vapor Transport ◽  
The West ◽  
North American West ◽  
The North ◽  
Extreme Precipitation Events

Abstract Most extreme precipitation events that occur along the North American west coast are associated with winter atmospheric river (AR) events. Global climate models have sufficient resolution to simulate synoptic features associated with AR events, such as high values of vertically integrated water vapor transport (IVT) approaching the coast. From phase 5 of the Coupled Model Intercomparison Project (CMIP5), 10 simulations are used to identify changes in ARs impacting the west coast of North America between historical (1970–99) and end-of-century (2070–99) runs, using representative concentration pathway (RCP) 8.5. The most extreme ARs are identified in both time periods by the 99th percentile of IVT days along a north–south transect offshore of the coast. Integrated water vapor (IWV) and IVT are predicted to increase, while lower-tropospheric winds change little. Winter mean precipitation along the west coast increases by 11%–18% [from 4% to 6% (°C)−1], while precipitation on extreme IVT days increases by 15%–39% [from 5% to 19% (°C)−1]. The frequency of IVT days above the historical 99th percentile threshold increases as much as 290% by the end of this century.

A New Species of Megalaria from the North American West Coast, and Notes on the Generic Circumscription

1996 ◽  
Vol 99 (1) ◽  
pp. 34 ◽  
Author(s):  
Stefan Ekman ◽  
Tor Tønsberg ◽  
Tor Tonsberg
Keyword(s):  
New Species ◽  
North American ◽  
West Coast ◽  
American West ◽  
North American West ◽  
The North ◽  
A New Species

scholarly journals Ocean Acidification Science Needs for Natural Resource Managers of the North American West Coast

Oceanography ◽  
2015 ◽  
Vol 25 (2) ◽  
pp. 170-181 ◽  
Author(s):  
Alexandria Boehm ◽  
◽  
Mark Jacobson ◽  
Michael O'Donnell ◽  
Martha Sutula ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Natural Resource ◽  
North American ◽  
West Coast ◽  
American West ◽  
North American West ◽  
The North ◽  
Resource Managers ◽  
Natural Resource Managers

scholarly journals Increasing ozone in marine boundary layer inflow at the west coasts of North America and Europe

2009 ◽  
Vol 9 (4) ◽  
pp. 1303-1323 ◽  
Author(s):  
D. D. Parrish ◽  
D. B. Millet ◽  
A. H. Goldstein
Keyword(s):  
Boundary Layer ◽  
North America ◽  
North American ◽  
West Coast ◽  
American West ◽  
Marine Boundary Layer ◽  
North American West ◽  
Mixing Ratios ◽  
The North ◽  
Marine Air

Abstract. An effective method is presented for determining the ozone (O3) mixing ratio in the onshore flow of marine air at the North American west coast. By combining the data available from all marine boundary layer (MBL) sites with simultaneous wind data, decadal temporal trends of MBL O3 in all seasons are established with high precision. The average springtime temporal trend over the past two decades is 0.46 ppbv/yr with a 95% confidence limit of 0.13 ppbv/yr, and statistically significant trends are found for all seasons except autumn, which does have a significantly smaller trend than other seasons. The average trend in mean annual ozone is 0.34±0.09 ppbv/yr. These decadal trends at the North American west coast present a striking comparison and contrast with the trends reported for the European west coast at Mace Head, Ireland. The trends in the winter, spring and summer seasons compare well at the two locations, while the Mace Head trend is significantly greater in autumn. Even though the trends are similar, the absolute O3 mixing ratios differ markedly, with the marine air arriving at Europe in all seasons containing 7±2 ppbv higher ozone than marine air arriving at North America. Further, the ozone mixing ratios at the North American west coast show no indication of stabilizing as has been reported for Mace Head. In a larger historical context the background boundary layer O3 mixing ratios over the 130 years covered by available data have increased substantially (by a factor of two to three), and this increase continues at present, at least in the MBL of the Pacific coast region of North America. The reproduction of the increasing trends in MBL O3 over the past two decades, as well as the difference in the O3 mixing ratios between the two coastal regions will present a significant challenge for global chemical transport models. Further, the ability of the models to at least semi-quantitatively reproduce the longer-term, historical trends may an even greater challenge.

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