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Coastal SageScrub Stays Alive and Migrant Birds Return

Smoggy days are likely to occur

Coastal sage scrub in bloom and riparian habitat
Coastal sage scrub in bloom and riparian habitat

San Diego’s Coastal SageScrub Vegetation is now at the very nadir of its growth cycle. But the late-summer rain we had a few weeks ago shattered the usual summer drought, and our “summer-deciduous” vegetation bounced back in days. Bright green still carpets many of the coastal hillsides that were shades of gray and yellow.

The Smoggiest Days of the Year are most likely to occur during the next several weeks. Persistent temperature inversions (warmer air overlying cool marine air) are frequent this time of year. These inversions conspire with the mountainous topography of East County to trap locally generated air pollution under a low-lying lid. During the worst episodes, San Diego County’s coastal area is the hapless recipient of additional smog sneaking down from the Los Angeles Basin. This often occurs when a Santa Ana wind condition begins to weaken: L.A. smog blown offshore by a Santa Ana may get pushed back our way when the normal sea breeze returns.

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Cooper's Hawk

Fall Migrant Birds such as wood warblers can be seen at Cabrillo National Monument and its vicinity on Point Loma, Torrey Pines State Reserve, and other parks and open spaces near the San Diego coast. Cooper’s or marsh hawks and even peregrine falcons may be seen following or pursuing these smaller birds.

September 25 marked the New Moon. The Waxing Crescent Moon phase begins and runs until the First Quarter Moon on October 2. At around 20 minutes after the time of sunset, look low in the southwestern sky, to the left of where the sun went down, and you will spot the moon’s thin crescent shape. Unlike in the spring season when the evening crescent moon “smiles” with upturned cusps, the autumn crescent-moon cusps point well to the left — toward the southern part of the sky.

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L.A. angst over newspaper loss not mirrored in San Diego

Jen Campbell sucks up GOP money
Coastal sage scrub in bloom and riparian habitat
Coastal sage scrub in bloom and riparian habitat

San Diego’s Coastal SageScrub Vegetation is now at the very nadir of its growth cycle. But the late-summer rain we had a few weeks ago shattered the usual summer drought, and our “summer-deciduous” vegetation bounced back in days. Bright green still carpets many of the coastal hillsides that were shades of gray and yellow.

The Smoggiest Days of the Year are most likely to occur during the next several weeks. Persistent temperature inversions (warmer air overlying cool marine air) are frequent this time of year. These inversions conspire with the mountainous topography of East County to trap locally generated air pollution under a low-lying lid. During the worst episodes, San Diego County’s coastal area is the hapless recipient of additional smog sneaking down from the Los Angeles Basin. This often occurs when a Santa Ana wind condition begins to weaken: L.A. smog blown offshore by a Santa Ana may get pushed back our way when the normal sea breeze returns.

Sponsored
Sponsored
Cooper's Hawk

Fall Migrant Birds such as wood warblers can be seen at Cabrillo National Monument and its vicinity on Point Loma, Torrey Pines State Reserve, and other parks and open spaces near the San Diego coast. Cooper’s or marsh hawks and even peregrine falcons may be seen following or pursuing these smaller birds.

September 25 marked the New Moon. The Waxing Crescent Moon phase begins and runs until the First Quarter Moon on October 2. At around 20 minutes after the time of sunset, look low in the southwestern sky, to the left of where the sun went down, and you will spot the moon’s thin crescent shape. Unlike in the spring season when the evening crescent moon “smiles” with upturned cusps, the autumn crescent-moon cusps point well to the left — toward the southern part of the sky.

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4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs
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