Plankton response to El Niño 1997–1998 and La Niña 1999 in the southern region of the California Current

2002 ◽  
Vol 54 (1-4) ◽  
pp. 33-58 ◽  
Author(s):  
B.E Lavaniegos ◽  
L.C Jiménez-Pérez ◽  
G Gaxiola-Castro
Keyword(s):  
El Niño ◽  
El Nino ◽  
California Current ◽  
Southern Region ◽  
La Niña ◽  
La Nina

scholarly journals Composite physical–biological El Niño and La Niña conditions in the California Current System in CESM1-POP2-BEC

2019 ◽  
Vol 142 ◽  
pp. 101439 ◽  
Author(s):  
Nathalí Cordero-Quirós ◽  
Arthur J. Miller ◽  
Aneesh C. Subramanian ◽  
Jessica Y. Luo ◽  
Antonietta Capotondi
Keyword(s):  
El Niño ◽  
El Nino ◽  
Current System ◽  
California Current ◽  
La Niña ◽  
California Current System ◽  
La Nina

scholarly journals Spatial analysis and model construction of NDVI Based on meteorological data

2022 ◽  
Vol 355 ◽  
pp. 03040
Author(s):  
Jifeng Wu ◽  
Yayu Cheng
Keyword(s):  
El Niño ◽  
Vegetation Change ◽  
Vegetation Index ◽  
El Nino ◽  
Meteorological Data ◽  
Southern Region ◽  
La Niña ◽  
La Nina ◽  
Geographical Regions ◽  
Precipitation And Temperature

NDVI (Normalized Vegetation Index) is an important characteristic index to study regional vegetation change, which is greatly influenced by meteorological data. Based on the analysis of the trend change and correlation between NDVI and PWV (Precipitable Water Vapor), precipitation and temperature in four geographical regions of China, this paper constructs a model between NDVI and PWV, precipitation and temperature in each geographical region according to multiple regression, and predicts NDVI through meteorological data. The results show that:(1) NDVI and meteorological factors have the same changing trend, and the maximum value appears in every region from June to September, and the value of NDVI in southern region is relatively large. (2) The correlation between rainfall and NDVI is the highest in Qinghai-Tibet region, the correlation between temperature, PWV and NDVI is the highest in northern region, the correlation between NDVI and rainfall, temperature and PWV is the lowest in southern region. (3)According to the meteorological data ,NDVI prediction can be achieved better, and the prediction effect in southern region is the best and the model accuracy is the highest. (4) NDVI is negatively related to El Niño event, positively related to La Nina event, and the stronger El Niño and La Nina events are, the higher the correlation is.

Rapid shift in zooplankton community composition on the northeast Pacific shelf during the 1998–1999 El Niño – La Niña event

2005 ◽  
Vol 62 (1) ◽  
pp. 133-144 ◽  
Author(s):  
Jeannette E Zamon ◽  
David W Welch
Keyword(s):  
El Niño ◽  
El Nino ◽  
California Current ◽  
Zooplankton Community ◽  
Historical Record ◽  
La Niña ◽  
The North ◽  
La Nina ◽  
La Nina Event ◽  
Rapid Shift

The 1997–1998 El Niño was one of the strongest ocean warming events in the historical record followed by an equally strong cold La Niña event in 1999. We observed a rapid shift in the marine zooplankton assemblage found in the transitional area between the California Current domain and the Alaska Gyre domain. Nonmetric multidimensional scaling revealed that the shift in species composition was caused primarily by changes in the relative abundance of subtropical neritic copepods normally found in the California Current domain. In 1998, the subtropical neritic copepods Paracalanus, Ctenocalanus, and Corycaeus were found as far north as 56°N and occurred in 100%, 96%, and 51% of 1998 samples versus 16%, 5%, and 3% of 1999 samples. The type and magnitude of change were similar to those observed off central Oregon but differed from those observed in southeast Alaska. Results support the hypothesis that anomalous poleward transport can inject significant California Current water into the coastal circulation of the Alaska Gyre and suggest that alongshore connectivity between the two domains may extend farther to the north than previously thought.

ANALISIS DAERAH RAWAN KEKERINGAN LAHAN JAGUNG BERDASARKAN IKLIM OLDEMAN DAN KETERSEDIAN AIR TANAH DI NUSA TENGGARA TIMUR SAAT PERIODE EL NINO DAN LA NINA

2019 ◽  
Vol 3 ◽  
pp. 1219
Author(s):  
Oki Adrianto ◽  
Sudirman Sudirman ◽  
Suwandi Suwandi
Keyword(s):  
El Niño ◽  
El Nino ◽  
La Niña ◽  
La Nina

Perekonomian Provinsi Nusa Tenggara Timur secara sektoral masih didominasi sektor pertanian.Tanaman jagung menjadi salah satu produksi tanaman pangan terbesar berdasarkan data dari Dinas Pertanian dan Perkebunan Provinsi Nusa Tenggara Timur tahun 2015. Peningkatan produksi pertanian dapat dilakukan melalui berbagai strategi adaptasi dan upaya penanganan bencana, salah satu upaya tersebut adalah dengan penyediaan informasi iklim terkait penentuan daerah-daerah rawan kekeringan. Tujuan dari penelitian ini adalah untuk mengetahui sebaran wilayah rawan kekeringan lahan jagung bulanan di Provinsi Nusa Tenggara Timur saat kondisi El Nino dan La Nina dengan periodeisasi bulanan januari hingga desember. Data yang digunakan dalam penelitian ini adalah data curah hujan rata rata bulanan di 19 pos hujan di Provinsi Nusa Tenggara Timur dan suhu udara rata-rata bulanan dihitung menggunakan pendekatan teori Brack dengan titik referensi Stasiun Klimatologi Lasiana Kupang. Periode dari masing-masing data yang digunakan adalah dari tahun 1991 dan 1997 digunakan sebagai tahun El Nino dan tahun 1999 dan 2010 digunakan sebagai tahun La Nina. Metode yang digunakan untuk menentukan tingkat rawan kekeringan dengan menggunakan pembobotan berdasarkan penjumlahan bobot tipe iklim Oldeman dan bobot ketersediaan air tanah. Hasil penelitian menunjukkan sebaran daerah kekeringan di Provinsi Nusa Tenggara Timurpada tahun el nino lebih luas dibandingkan tahun la nina.

Sign in / Sign up

Export Citation Format

Share Document