TY - JOUR A1 - An, Z. A1 - Rey, D. A1 - Ye, J. A1 - Abarbanel, H. D. I. T1 - Estimating the state of a geophysical system with sparse observations: time delay methods to achieve accurate initialĀ statesĀ for prediction JO - Nonlin. Processes Geophys. J1 - NPG VL - 24 IS - 1 SP - 9 EP - 22 Y1 - 2017/01/16 PB - Copernicus Publications SN - 1607-7946 UR - https://npg.copernicus.org/articles/24/9/2017/ L1 - https://npg.copernicus.org/articles/24/9/2017/npg-24-9-2017.pdf DO - 10.5194/npg-24-9-2017 ER -